diff --git a/.gitignore b/.gitignore
index b3536eb..34d5687 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,6 +41,7 @@ CMakeError.log
 *~
 .DS_Store
 assets/config.toml
+assets/server-config.toml
 .venv/
 pyout/
 vcpkg_installed/
\ No newline at end of file
diff --git a/include/Cubed/app.hpp b/include/Cubed/app.hpp
index dcea01b..bde0f9c 100644
--- a/include/Cubed/app.hpp
+++ b/include/Cubed/app.hpp
@@ -5,6 +5,7 @@
 #include "Cubed/gameplay/server_world.hpp"
 #define GLFW_INCLUDE_NONE
 #include "Cubed/camera.hpp"
+#include "Cubed/config.hpp"
 #include "Cubed/dev_panel.hpp"
 #include "Cubed/render/renderer.hpp"
 #include "Cubed/texture_manager.hpp"
@@ -49,23 +50,23 @@ public:
     Window& window();
     ClientWorld& client_world();
     ServerWorld& server_world();
+    Config& config();
     const Argument& argument() const;
     AudioEngine& audio();
 
 private:
+    Config m_game_config;
     Camera m_camera;
     TextureManager m_texture_manager;
     NetworkServer m_server;
     std::shared_ptr<NetworkClient> m_client;
+    AudioEngine m_audio;
     ClientWorld m_client_world;
 
-    DevPanel m_dev_panel{*this};
-    Renderer m_renderer{m_camera, m_client_world, m_texture_manager,
-                        m_dev_panel};
+    DevPanel m_dev_panel;
+    Renderer m_renderer;
 
-    Window m_window{m_renderer};
-
-    AudioEngine m_audio;
+    Window m_window;
 
     inline static double last_time = glfwGetTime();
     inline static double current_time = glfwGetTime();
@@ -74,6 +75,7 @@ private:
     inline static int frame_count = 0;
     inline static int fps = 0;
     Argument m_argument;
+
     void init(int argc, char** argv);
     void handle_argument(int argc, char** argv);
     void handle_toml();
diff --git a/include/Cubed/audio/audio_engine.hpp b/include/Cubed/audio/audio_engine.hpp
index 84342e7..56a2b97 100644
--- a/include/Cubed/audio/audio_engine.hpp
+++ b/include/Cubed/audio/audio_engine.hpp
@@ -4,6 +4,7 @@
 #include "Cubed/audio/audio_source.hpp"
 #include "Cubed/audio/sound_manager.hpp"
 #include "Cubed/audio/source_pool.hpp"
+#include "Cubed/config.hpp"
 
 #include <AL/al.h>
 #include <AL/alc.h>
@@ -17,7 +18,7 @@ class ClientWorld;
 
 class AudioEngine {
 public:
-    AudioEngine();
+    AudioEngine(Config& config);
     AudioEngine(const AudioEngine&) = delete;
     AudioEngine(AudioEngine&&) = delete;
     AudioEngine& operator=(const AudioEngine&) = delete;
@@ -48,6 +49,7 @@ private:
     std::unique_ptr<AudioSource> m_bgm;
     FadeMap m_fade_map;
     SoundManager m_sounds;
+    Config& m_config;
     std::shared_ptr<SourcePool> m_pool;
     bool m_efx_supported = false;
     bool m_underwater = false;
diff --git a/include/Cubed/config.hpp b/include/Cubed/config.hpp
index 113dc2b..9acb689 100644
--- a/include/Cubed/config.hpp
+++ b/include/Cubed/config.hpp
@@ -1,99 +1,75 @@
 #pragma once
-#include "Cubed/tools/cubed_assert.hpp"
 #include "Cubed/tools/toml.utils.hpp"
 
 namespace Cubed {
 
 class Config {
 public:
-    Config();
+    explicit Config(std::string_view path);
+    Config(const Config&) = delete;
+    Config(Config&&) = delete;
+    Config& operator=(const Config&) = delete;
+    Config& operator=(Config&&) = delete;
     ~Config();
 
-    static Config& get();
-
     toml::table& table();
 
-    void load_or_create_config();
+    void load_config();
     void save_to_file();
 
-    template <TOML::TomlValueType T> T get(std::string_view key) const {
-        size_t cur = 0;
-        auto pos = key.find('.');
-        const toml::table* table = &m_tbl;
-        while (pos != std::string_view::npos) {
-            std::string_view s = key.substr(cur, pos - cur);
-            if (s.empty()) {
-                Logger::error("Empty key/table name in path '{}'", key);
-                ASSERT(false);
-                std::abort();
-            }
-            cur = pos + 1;
-            pos = key.find('.', cur);
-            if (auto* next = (*table)[s].as_table()) {
-                table = next;
-            } else {
-                Logger::error("Can't find table {}", s);
-                ASSERT(false);
-                std::abort();
-            }
+    template <TOML::TomlValueType T>
+    T get(std::string_view key, T default_value) {
+        if (auto* node = find_node(m_tbl, key)) {
+            if (auto value = node->value<T>())
+                return *value;
         }
-        std::string_view n_key = key.substr(cur);
-        if (n_key.empty()) {
-            Logger::error("Trailing dot in path '{}'", key);
-            ASSERT(false);
-            std::abort();
-        }
-        auto opt = (*table)[n_key].value<T>();
-        if (opt) {
-            return *opt;
+
+        set(key, default_value);
+        save_to_file();
+
+        return default_value;
+    }
+
+    template <TOML::TomlValueType T> void set(std::string_view key, T&& value) {
+        auto pos = key.rfind('.');
+
+        toml::table* table;
+        std::string_view name;
+
+        if (pos == std::string_view::npos) {
+            table = &m_tbl;
+            name = key;
         } else {
-            Logger::error("Can't find key {}", n_key);
-            ASSERT(false);
-            std::abort();
+            table = find_or_create_table(key.substr(0, pos));
+            name = key.substr(pos + 1);
         }
+        // Insert node at the last level's table
+        table->insert_or_assign(name, std::forward<T>(value));
     }
-    template <typename T> void set(std::string_view key, T&& val) {
-        if constexpr (!TOML::TomlValueType<std::decay_t<T>>) {
-            static_assert(false, "Type Not Support");
-        }
-        size_t cur = 0;
-        auto pos = key.find('.');
-        toml::table* table = &m_tbl;
-        while (pos != std::string_view::npos) {
-            std::string_view s = key.substr(cur, pos - cur);
-            if (s.empty()) {
-                Logger::error("Empty key/table name in path '{}'", key);
-                ASSERT(false);
-                std::abort();
-            }
-            cur = pos + 1;
-            pos = key.find('.', cur);
-            if (auto* next = (*table)[s].as_table()) {
-                table = next;
-            } else {
-                auto [it, inserted] = table->insert_or_assign(s, toml::table{});
-                table = it->second.as_table();
-            }
-        }
-        std::string_view n_key = key.substr(cur);
-        if (n_key.empty()) {
-            Logger::error("Trailing dot in path '{}'", key);
-            ASSERT(false);
-            std::abort();
-        }
-        table->insert_or_assign(n_key, std::forward<T>(val));
-    }
+
     template <typename T> void set_and_save(std::string_view key, T&& val) {
         set(key, std::forward(val));
         save_to_file();
     }
-    toml::node_view<toml::node> val_view(std::string_view key);
 
 private:
     toml::table m_tbl;
-    constexpr static inline std::string_view CONGIF_PATH =
-        ASSETS_PATH "config.toml";
-    void create_config();
+    const std::string CONGIF_PATH;
+    const toml::node* find_node(const toml::table& root,
+                                std::string_view path) const;
+    // Follow the path to find the last-level toml::table, creating it if it
+    // does not exist
+    toml::table* find_or_create_table(std::string_view path);
 };
 
+template <>
+inline float Config::get(std::string_view key, float default_value) {
+    return static_cast<float>(
+        Config::get<double>(key, static_cast<double>(default_value)));
+}
+
+template <> inline void Config::set(std::string_view key, float&& value) {
+    Config::set<double>(key, static_cast<double>(value));
+}
+
 } // namespace Cubed
diff --git a/include/Cubed/dev_panel.hpp b/include/Cubed/dev_panel.hpp
index e237c3a..1f927fd 100644
--- a/include/Cubed/dev_panel.hpp
+++ b/include/Cubed/dev_panel.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "Cubed/config.hpp"
+
 #include <toml++/toml.hpp>
 
 namespace Cubed {
@@ -36,7 +38,8 @@ public:
 
 private:
     App& m_app;
-    ConfigView m_config;
+    Config& m_config;
+    ConfigView m_config_view;
     ClientPlayer* m_player;
     PlayerProfile m_player_profile;
     bool m_need_save_config = false;
diff --git a/include/Cubed/gameplay/client_player.hpp b/include/Cubed/gameplay/client_player.hpp
index cdaf56e..9baaecc 100644
--- a/include/Cubed/gameplay/client_player.hpp
+++ b/include/Cubed/gameplay/client_player.hpp
@@ -25,7 +25,7 @@ public:
 
     void update_chunk_set(const ChunkPosSet& set);
     const ChunkPosSet& get_chunk_pos_set() const;
-    ChunkPosSet& get_chunk_pos_set();
+    ChunkPosSet get_chunk_pos_set();
 
     static AABB get_aabb(const glm::vec3& pos);
     const glm::vec3& get_front() const;
diff --git a/include/Cubed/gameplay/client_world.hpp b/include/Cubed/gameplay/client_world.hpp
index 310a294..2ec0596 100644
--- a/include/Cubed/gameplay/client_world.hpp
+++ b/include/Cubed/gameplay/client_world.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include "Cubed/audio/audio_engine.hpp"
+#include "Cubed/config.hpp"
 #include "Cubed/gameplay/block.hpp"
 #include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/client_chunk.hpp"
@@ -43,7 +44,7 @@ struct PlayerRenderData {
 
 class ClientWorld {
 public:
-    ClientWorld(AudioEngine& auido);
+    ClientWorld(AudioEngine& auido, Config& config);
     ~ClientWorld();
     void init(std::string_view player_name,
               std::shared_ptr<NetworkClient> client);
@@ -95,6 +96,7 @@ public:
     int chunk_size() const;
     static AABB get_block_aabb(const glm::ivec3& pos);
     AudioEngine& get_audio();
+    Config& get_config();
     template <typename Fn>
     void register_ticktimer(std::string_view id, TickType threshold, Fn&& f) {
         m_ticktimers.emplace(
@@ -103,6 +105,12 @@ public:
     }
 
 private:
+    std::atomic<bool> m_is_pending_delete_queue_free{false};
+    std::mutex m_delete_vbo_mutex;
+    std::mutex m_delete_vao_mutex;
+    std::vector<std::unique_ptr<VertexBuffer>> m_pending_delete_vbo;
+    std::vector<std::unique_ptr<VertexArray>> m_pending_delete_vao;
+
     enum class ChunkLoadStyle { RANDOM, CENTER };
     using ChunkHashMap =
         tbb::concurrent_hash_map<ChunkPos, std::shared_ptr<ClientChunk>,
@@ -124,18 +132,15 @@ private:
     OtherPlayerHashMap m_player_info;
     ChunkHashMap m_chunks;
     AudioEngine& m_audio;
+    Config& m_config;
     std::vector<glm::vec4> m_planes;
     std::jthread m_client_thread;
 
-    std::mutex m_delete_vbo_mutex;
-    std::mutex m_delete_vao_mutex;
     mutable std::shared_mutex m_player_info_mutex;
 
     tbb::concurrent_queue<std::unique_ptr<ClientChunk>> m_pending_upload_queue;
     tbb::concurrent_queue<ChunkPos> m_dirty_chunk_queue;
     tbb::concurrent_queue<PendingSound> m_pending_sound;
-    std::vector<std::unique_ptr<VertexBuffer>> m_pending_delete_vbo;
-    std::vector<std::unique_ptr<VertexArray>> m_pending_delete_vao;
 
     std::deque<ChunkPos> m_dirty_queue;
     std::vector<const ChunkRenderSnapshot*> m_render_snapshots;
diff --git a/include/Cubed/gameplay/network_server.hpp b/include/Cubed/gameplay/network_server.hpp
index 5ed0ace..f12fbd6 100644
--- a/include/Cubed/gameplay/network_server.hpp
+++ b/include/Cubed/gameplay/network_server.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include "Cubed/config.hpp"
 #include "Cubed/gameplay/server_world.hpp"
 #include "Cubed/gameplay/session.hpp"
 
@@ -8,17 +9,19 @@ namespace Cubed {
 
 class NetworkServer {
 public:
-    NetworkServer(int port = 25530);
+    explicit NetworkServer();
     ~NetworkServer();
     void stop();
 
     // Run in another thread after initialization is complete
-    void start_server(int port = 25530);
-
+    void start_server(int port);
+    void start_server();
     int port() const;
     ServerWorld& server_world();
 
 private:
+    Config m_config;
+
     asio::io_context m_io;
     std::thread m_net_thread;
     int m_port = 25530;
diff --git a/include/Cubed/gameplay/server_world.hpp b/include/Cubed/gameplay/server_world.hpp
index 49e65a4..2c86e2e 100644
--- a/include/Cubed/gameplay/server_world.hpp
+++ b/include/Cubed/gameplay/server_world.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Cubed/config.hpp"
 #include "Cubed/gameplay/cave_carver.hpp"
 #include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/game_time.hpp"
@@ -25,7 +26,7 @@ class Session;
 class ServerWorld {
 public:
     enum class ThreadPoolKind { NET, GEN };
-    ServerWorld();
+    ServerWorld(Config& config);
     ~ServerWorld();
     void stop();
     void handle_player_exit(const std::string& uuid);
@@ -118,6 +119,9 @@ private:
 
     using uuid_acc = PlayerUUIDMap::accessor;
     using uuid_cacc = PlayerUUIDMap::const_accessor;
+
+    Config& m_config;
+
     // key = uuid
     PlayerHashMap m_players;
     ChunkHashMap m_chunks;
diff --git a/include/Cubed/map_table.hpp b/include/Cubed/map_table.hpp
deleted file mode 100644
index 6a262f0..0000000
--- a/include/Cubed/map_table.hpp
+++ /dev/null
@@ -1,26 +0,0 @@
-#pragma once
-// #include <string>
-// #include <unordered_map>
-// #include <vector>
-namespace Cubed {
-
-class MapTable {
-private:
-    /*
-        static inline std::unordered_map<unsigned, std::string> id_to_name_map;
-        static inline std::unordered_map<size_t, unsigned> name_to_id_map;
-        static inline std::vector<std::string> item_id_to_name;
-    */
-public:
-    // please using reference
-    /*
-    static std::string_view get_name_from_id(unsigned id);
-    static unsigned get_id_from_name(const std::string& name);
-
-    static std::string_view item_name(unsigned id);
-    static const std::vector<std::string>& item_map();
-    */
-    static void init_map();
-};
-
-} // namespace Cubed
\ No newline at end of file
diff --git a/include/Cubed/render/renderer.hpp b/include/Cubed/render/renderer.hpp
index 240a961..38f6949 100644
--- a/include/Cubed/render/renderer.hpp
+++ b/include/Cubed/render/renderer.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Cubed/config.hpp"
 #include "Cubed/constants.hpp"
 #include "Cubed/primitive_data.hpp"
 #include "Cubed/render/player_renderer.hpp"
@@ -23,7 +24,8 @@ public:
     constexpr static int NUM_VAO = 7;
 
     Renderer(const Camera& camera, ClientWorld& world,
-             const TextureManager& texture_manager, DevPanel& dev_panel);
+             const TextureManager& texture_manager, DevPanel& dev_panel,
+             Config& config);
     ~Renderer();
     void hot_reload();
     void init(bool debug_on);
@@ -109,7 +111,7 @@ private:
     std::vector<Vertex2D> m_ui;
 
     WorldRenderer m_world_renderer;
-
+    Config& m_config;
     void init_quad();
     void init_text();
 
diff --git a/include/Cubed/texture_manager.hpp b/include/Cubed/texture_manager.hpp
index 5807aee..edd31f2 100644
--- a/include/Cubed/texture_manager.hpp
+++ b/include/Cubed/texture_manager.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include "Cubed/config.hpp"
 #include "Cubed/gameplay/block.hpp"
 #include "Cubed/render/texture.hpp"
 
@@ -19,7 +20,7 @@ private:
     std::unique_ptr<Texture> m_skin;
     std::vector<std::unique_ptr<Texture>> m_item_textures;
     GLfloat m_max_aniso = 0.0f;
-
+    Config& m_config;
     int m_aniso = 1;
 
     void load_block_status(unsigned status_id);
@@ -36,7 +37,7 @@ private:
     void hot_reload();
 
 public:
-    TextureManager();
+    TextureManager(Config& config);
     ~TextureManager();
 
     void delete_texture();
diff --git a/include/Cubed/tools/toml.utils.hpp b/include/Cubed/tools/toml.utils.hpp
index 97a2984..c332669 100644
--- a/include/Cubed/tools/toml.utils.hpp
+++ b/include/Cubed/tools/toml.utils.hpp
@@ -14,6 +14,7 @@ concept TomlValueType =
     std::same_as<std::decay_t<T>, toml::date> ||
     std::same_as<std::decay_t<T>, toml::time> ||
     std::same_as<std::decay_t<T>, toml::date_time> ||
+    std::same_as<std::decay_t<T>, float> ||
     std::same_as<std::decay_t<T>, std::string>;
 
 template <TomlValueType T>
diff --git a/include/Cubed/window.hpp b/include/Cubed/window.hpp
index 4d23be0..d1de2e2 100644
--- a/include/Cubed/window.hpp
+++ b/include/Cubed/window.hpp
@@ -1,4 +1,7 @@
 #pragma once
+
+#include "Cubed/config.hpp"
+
 #define GLFW_INCLUDE_NONE
 #include <GLFW/glfw3.h>
 namespace Cubed {
@@ -6,7 +9,7 @@ namespace Cubed {
 class Renderer;
 class Window {
 public:
-    Window(Renderer& renderer);
+    Window(Renderer& renderer, Config& config);
     ~Window();
 
     bool is_mouse_enable() const;
@@ -29,6 +32,7 @@ private:
     int m_width;
     int m_height;
     Renderer& m_renderer;
+    Config& m_config;
 };
 
 } // namespace Cubed
\ No newline at end of file
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0aa2087..620bf53 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -10,7 +10,6 @@ target_sources(${PROJECT_NAME}
         gameplay/chunk_generator.cpp
         gameplay/tree.cpp
         input.cpp
-        map_table.cpp
         render/renderer.cpp
         shader.cpp
         texture_manager.cpp
diff --git a/src/app.cpp b/src/app.cpp
index b1ed66f..196b7e0 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -12,7 +12,14 @@
 #include <imgui_impl_glfw.h>
 namespace Cubed {
 
-App::App() : m_client_world(m_audio) {}
+App::App()
+
+    : m_game_config(ASSETS_PATH "config.toml"),
+      m_texture_manager(m_game_config), m_audio(m_game_config),
+      m_client_world(m_audio, m_game_config), m_dev_panel(*this),
+      m_renderer(m_camera, m_client_world, m_texture_manager, m_dev_panel,
+                 m_game_config),
+      m_window(m_renderer, m_game_config) {}
 
 App::~App() {
     if (m_client) {
@@ -357,7 +364,7 @@ void App::update() {
     const auto& player = m_client_world.get_player();
     if (player_gait != player.get_gait()) {
         player_gait = player.get_gait();
-        float fov = static_cast<float>(Config::get().get<double>("player.fov"));
+        float fov = m_game_config.get("player.fov", 70.0f);
         if (player_gait == Gait::WALK) {
             m_renderer.update_fov(fov);
         }
@@ -401,6 +408,7 @@ TextureManager& App::texture_manager() { return m_texture_manager; }
 Window& App::window() { return m_window; }
 ClientWorld& App::client_world() { return m_client_world; }
 ServerWorld& App::server_world() { return m_server.server_world(); }
+Config& App::config() { return m_game_config; }
 const App::Argument& App::argument() const { return m_argument; }
 AudioEngine& App::audio() { return m_audio; }
 } // namespace Cubed
\ No newline at end of file
diff --git a/src/audio/audio_engine.cpp b/src/audio/audio_engine.cpp
index 85b9372..26f17ee 100644
--- a/src/audio/audio_engine.cpp
+++ b/src/audio/audio_engine.cpp
@@ -1,14 +1,13 @@
 #include "Cubed/audio/audio_engine.hpp"
 
 #include "Cubed/audio/audio_error.hpp"
-#include "Cubed/config.hpp"
 #include "Cubed/tools/cubed_assert.hpp"
 #include "Cubed/tools/log.hpp"
 
 #include <stdexcept>
 
 namespace Cubed {
-AudioEngine::AudioEngine() {};
+AudioEngine::AudioEngine(Config& config) : m_config(config) {};
 
 AudioEngine::~AudioEngine() {
     if (!m_init) {
@@ -64,10 +63,8 @@ void AudioEngine::init() {
     alDistanceModel(AL_INVERSE_DISTANCE_CLAMPED);
     check_al_error();
 
-    auto& config = Config::get();
-
-    m_music_volume = static_cast<float>(config.get<double>("volume.music"));
-    m_sfx_volume = static_cast<float>(config.get<double>("volume.SFX"));
+    m_music_volume = m_config.get("volume.music", 1.0f);
+    m_sfx_volume = m_config.get("volume.SFX", 1.0f);
 
     m_sounds.init();
 
@@ -187,10 +184,8 @@ void AudioEngine::update() {
 }
 
 void AudioEngine::reload_config() {
-    auto& config = Config::get();
-
-    m_music_volume = static_cast<float>(config.get<double>("volume.music"));
-    m_sfx_volume = static_cast<float>(config.get<double>("volume.SFX"));
+    m_music_volume = m_config.get("volume.music", 1.0f);
+    m_sfx_volume = m_config.get("volume.SFX", 1.0f);
     if (m_bgm) {
         m_bgm->set_target_volume(m_music_volume);
     }
diff --git a/src/config.cpp b/src/config.cpp
index 9af4922..762233b 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -1,6 +1,5 @@
 #include "Cubed/config.hpp"
 
-#include "Cubed/tools/cubed_assert.hpp"
 #include "Cubed/tools/log.hpp"
 
 #include <filesystem>
@@ -11,71 +10,24 @@ using namespace std::string_view_literals;
 
 namespace Cubed {
 
-Config::Config() { load_or_create_config(); }
+Config::Config(std::string_view path) : CONGIF_PATH(path) { load_config(); }
 
 Config::~Config() { save_to_file(); }
 
-Config& Config::get() {
-    static Config instance;
-    return instance;
-}
-
 toml::table& Config::table() { return m_tbl; }
 
-void Config::create_config() {
-    static constexpr auto SOURCE = R"(
-
-        [window]
-        width = 800
-        height = 600
-        fullscreen = false
-        V-Sync = true
-
-        [player]
-        fov = 70.0 
-        mouse_sensitivity = 0.15
-
-        [world]
-        rendering_distance = 24
-        
-        [devpanel]
-        theme = 0       # 0 is Dark Theme, 1 is Light Theme
-
-        [texture]
-        aniso = 1       # i is the minimun value, indicating off 
-
-        [volume]
-        music = 1.0
-        SFX = 1.0
-
-
-    )"sv;
-
-    try {
-        m_tbl = toml::parse(SOURCE);
-    } catch (const toml::parse_error& err) {
-        Logger::error("Load Config Error {}", err.what());
-        ASSERT(false);
-        std::abort();
-    }
-    Logger::info("Create New Config File Success");
-}
-
-void Config::load_or_create_config() {
+void Config::load_config() {
     fs::path config_path{CONGIF_PATH};
-    if (!fs::is_regular_file(config_path)) {
-        create_config();
-    } else
+
+    if (fs::is_regular_file(config_path)) {
         try {
             m_tbl = toml::parse_file(config_path.string());
+            Logger::info("Load Config File Success");
         } catch (const toml::parse_error& err) {
             Logger::error("Load Config Error: \"{}\"", err.what());
-            create_config();
         }
-
-    Logger::info("Load Config File Success");
+    }
 }
-
 void Config::save_to_file() {
     fs::path config_path{CONGIF_PATH};
     std::ofstream file{config_path};
@@ -83,40 +35,54 @@ void Config::save_to_file() {
     Logger::info("Save File Success");
 }
 
-toml::node_view<toml::node> Config::val_view(std::string_view key) {
+const toml::node* Config::find_node(const toml::table& root,
+                                    std::string_view path) const {
+    const toml::table* table = &root;
+
     size_t cur = 0;
-    auto pos = key.find('.');
-    toml::table* table = &m_tbl;
+    auto pos = path.find('.');
+
     while (pos != std::string_view::npos) {
-        std::string_view s = key.substr(cur, pos - cur);
-        if (s.empty()) {
-            Logger::error("Empty key/table name in path '{}'", key);
-            ASSERT(false);
-            std::abort();
-        }
-        cur = pos + 1;
-        pos = key.find('.', cur);
-        if (auto* next = (*table)[s].as_table()) {
+        auto name = path.substr(cur, pos - cur);
+
+        if (auto* next = (*table)[name].as_table()) {
             table = next;
         } else {
-            Logger::error("Can't find table {}", s);
-            ASSERT(false);
-            std::abort();
+            return nullptr;
         }
+
+        cur = pos + 1;
+        pos = path.find('.', cur);
     }
-    std::string_view n_key = key.substr(cur);
-    if (n_key.empty()) {
-        Logger::error("Trailing dot in path '{}'", key);
-        ASSERT(false);
-        std::abort();
+
+    auto key = path.substr(cur);
+
+    return (*table)[key].node();
+}
+
+toml::table* Config::find_or_create_table(std::string_view path) {
+    toml::table* table = &m_tbl;
+
+    while (true) {
+        auto pos = path.find('.');
+        auto part = pos == std::string_view::npos ? path : path.substr(0, pos);
+
+        if (auto* next = (*table)[part].as_table()) {
+            // If there is a table, proceed to the next
+            table = next;
+        } else {
+            // If there is no table, create a new one
+            auto [it, _] = table->insert(part, toml::table{});
+            table = it->second.as_table();
+        }
+
+        if (pos == std::string_view::npos)
+            break;
+
+        path.remove_prefix(pos + 1);
     }
-    auto view = (*table)[n_key];
-    if (!view) {
-        Logger::error("The view is null");
-        ASSERT(false);
-        std::abort();
-    }
-    return view;
+
+    return table;
 }
 
 } // namespace Cubed
\ No newline at end of file
diff --git a/src/dev_panel.cpp b/src/dev_panel.cpp
index 2f47eb0..a01faf8 100644
--- a/src/dev_panel.cpp
+++ b/src/dev_panel.cpp
@@ -46,7 +46,7 @@ constexpr float DELTA_ANGLE_MAX = 30.0f;
 constexpr int PATH_STEP_MIN = 1;
 constexpr int PATH_STEP_MAX = 1000;
 
-DevPanel::DevPanel(App& app) : m_app(app) {}
+DevPanel::DevPanel(App& app) : m_app(app), m_config(app.config()) {}
 
 void DevPanel::init() {
     m_player = &m_app.client_world().get_player();
@@ -355,96 +355,95 @@ void DevPanel::show_chunk_table_bar() {
 
 void DevPanel::show_settings_tab_item() {
     if (ImGui::BeginTabItem("settings")) {
-        if (ImGui::SliderFloat("FOV", &m_config.fov, 1.0f, 140.0f)) {
-            Config::get().set("player.fov", static_cast<double>(m_config.fov));
+        if (ImGui::SliderFloat("FOV", &m_config_view.fov, 1.0f, 140.0f)) {
+            m_config.set("player.fov", static_cast<double>(m_config_view.fov));
             m_app.renderer().hot_reload();
         }
         ImGui::SameLine();
         if (ImGui::Button("default##1")) {
-            m_config.fov = DEFAULT_FOV;
-            Config::get().set("player.fov", static_cast<double>(m_config.fov));
+            m_config_view.fov = DEFAULT_FOV;
+            m_config.set("player.fov", static_cast<double>(m_config_view.fov));
             m_app.renderer().hot_reload();
         }
-        if (ImGui::SliderFloat("Sensitivity", &m_config.mouse_sensitivity,
+        if (ImGui::SliderFloat("Sensitivity", &m_config_view.mouse_sensitivity,
                                0.01f, 1.0f)) {
-            Config::get().set("player.mouse_sensitivity",
-                              static_cast<double>(m_config.mouse_sensitivity));
+            m_config.set("player.mouse_sensitivity",
+                         static_cast<double>(m_config_view.mouse_sensitivity));
             m_player->hot_reload();
         }
         ImGui::SameLine();
         if (ImGui::Button("default##2")) {
-            m_config.mouse_sensitivity = 0.15f;
-            Config::get().set("player.mouse_sensitivity",
-                              static_cast<double>(m_config.mouse_sensitivity));
+            m_config_view.mouse_sensitivity = 0.15f;
+            m_config.set("player.mouse_sensitivity",
+                         static_cast<double>(m_config_view.mouse_sensitivity));
             m_player->hot_reload();
         }
 
-        if (ImGui::SliderInt("Distance", &m_config.rendering_distance, 2,
+        if (ImGui::SliderInt("Distance", &m_config_view.rendering_distance, 2,
                              128)) {
-            Config::get().set("world.rendering_distance",
-                              m_config.rendering_distance);
+            m_config.set("world.rendering_distance",
+                         m_config_view.rendering_distance);
             m_app.client_world().hot_reload();
         }
-        if (ImGui::Checkbox("Fullscreen", &m_config.fullscreen)) {
-            Config::get().set("window.fullscreen", m_config.fullscreen);
+        if (ImGui::Checkbox("Fullscreen", &m_config_view.fullscreen)) {
+            m_config.set("window.fullscreen", m_config_view.fullscreen);
             m_app.window().hot_reload();
         }
         ImGui::SameLine();
-        if (ImGui::Checkbox("V-Sync", &m_config.v_sync)) {
-            Config::get().set("window.V-Sync", m_config.v_sync);
+        if (ImGui::Checkbox("V-Sync", &m_config_view.v_sync)) {
+            m_config.set("window.V-Sync", m_config_view.v_sync);
             m_app.window().hot_reload();
         }
-        if (ImGui::Checkbox("Aniso", &m_config.is_enable_aniso)) {
-            m_config.is_reload = false;
-            if (m_config.is_enable_aniso) {
-                m_config.max_aniso = m_app.texture_manager().max_aniso();
-                if (m_config.max_aniso < 2) {
-                    m_config.is_support_aniso = false;
+        if (ImGui::Checkbox("Aniso", &m_config_view.is_enable_aniso)) {
+            m_config_view.is_reload = false;
+            if (m_config_view.is_enable_aniso) {
+                m_config_view.max_aniso = m_app.texture_manager().max_aniso();
+                if (m_config_view.max_aniso < 2) {
+                    m_config_view.is_support_aniso = false;
                 } else {
-                    m_config.aniso = 2;
+                    m_config_view.aniso = 2;
                 }
             } else {
-                m_config.aniso = 1;
+                m_config_view.aniso = 1;
             }
         }
-        if (m_config.is_enable_aniso) {
+        if (m_config_view.is_enable_aniso) {
             ImGui::SameLine();
-            if (!m_config.is_support_aniso) {
+            if (!m_config_view.is_support_aniso) {
                 ImGui::Text("Not Support\n");
             } else {
-                if (ImGui::SliderInt("##aniso", &m_config.aniso, 2,
-                                     m_config.max_aniso)) {
-                    m_config.is_reload = false;
+                if (ImGui::SliderInt("##aniso", &m_config_view.aniso, 2,
+                                     m_config_view.max_aniso)) {
+                    m_config_view.is_reload = false;
                     int log =
-                        static_cast<int>(std::log2(m_config.aniso) + 0.5f);
-                    m_config.aniso = static_cast<int>(std::pow(2, log));
-                    if (m_config.aniso < 2) {
-                        m_config.aniso = 2;
+                        static_cast<int>(std::log2(m_config_view.aniso) + 0.5f);
+                    m_config_view.aniso = static_cast<int>(std::pow(2, log));
+                    if (m_config_view.aniso < 2) {
+                        m_config_view.aniso = 2;
                     }
-                    if (m_config.aniso > m_config.max_aniso) {
-                        m_config.aniso = m_config.max_aniso;
+                    if (m_config_view.aniso > m_config_view.max_aniso) {
+                        m_config_view.aniso = m_config_view.max_aniso;
                     }
                 }
             }
         }
         if (ImGui::Button("ReloadTexture")) {
-            Config::get().set("texture.aniso", m_config.aniso);
+            m_config.set("texture.aniso", m_config_view.aniso);
             m_app.texture_manager().need_reload();
-            m_config.is_reload = true;
+            m_config_view.is_reload = true;
         }
-        if (!m_config.is_reload) {
+        if (!m_config_view.is_reload) {
             ImGui::SameLine();
             ImGui::Text("Your need to click this button to apply config\n");
         }
 
-        if (ImGui::SliderFloat("Music", &m_config.volume_music, 0.0f, 1.0f)) {
-            Config::get().set("volume.music",
-                              static_cast<double>(m_config.volume_music));
+        if (ImGui::SliderFloat("Music", &m_config_view.volume_music, 0.0f,
+                               1.0f)) {
+            m_config.set("volume.music", m_config_view.volume_music);
             m_app.audio().reload_config();
         }
-        if (ImGui::SliderFloat("SFX", &m_config.volume_sfx, 0.0f, 1.0f)) {
-            Config::get().set("volume.SFX",
-                              static_cast<double>(m_config.volume_sfx));
+        if (ImGui::SliderFloat("SFX", &m_config_view.volume_sfx, 0.0f, 1.0f)) {
+            m_config.set("volume.SFX", m_config_view.volume_sfx);
             m_app.audio().reload_config();
         }
         if (ImGui::Combo("Theme", &m_theme, THEMES, IM_ARRAYSIZE(THEMES))) {
@@ -453,10 +452,10 @@ void DevPanel::show_settings_tab_item() {
             } else if (m_theme == 1) {
                 ImGui::StyleColorsLight();
             }
-            Config::get().set("devpanel.theme", m_theme);
+            m_config.set("devpanel.theme", m_theme);
         }
         if (ImGui::Button("save")) {
-            Config::get().save_to_file();
+            m_config.save_to_file();
         }
 
         ImGui::EndTabItem();
@@ -750,32 +749,28 @@ void DevPanel::show_shader_tab_item() {
 }
 
 void DevPanel::update_config_view() {
-    auto config = Config::get();
-    m_config.fov =
-        static_cast<float>(config.val_view("player.fov").value_or(70.0));
-    m_config.fullscreen = config.val_view("window.fullscreen").value_or(false);
-    m_config.v_sync = config.val_view("window.V-Sync").value_or(true);
-    m_config.mouse_sensitivity = static_cast<float>(
-        config.val_view("player.mouse_sensitivity").value_or(0.15));
-    m_config.width = config.val_view("window.width").value_or(800);
-    m_config.height = config.val_view("window.height").value_or(600);
-    m_config.rendering_distance =
-        config.val_view("world.rendering_distance").value_or(24);
-    m_theme = config.val_view("devpanel.theme").value_or(0);
+    m_config_view.fov = m_config.get("player.fov", 70.0f);
+    m_config_view.fullscreen = m_config.get("window.fullscreen", false);
+    m_config_view.v_sync = m_config.get("window.V-Sync", true);
+    m_config_view.mouse_sensitivity =
+        m_config.get("player.mouse_sensitivity", 0.15f);
+    m_config_view.width = m_config.get("window.width", 800);
+    m_config_view.height = m_config.get("window.height", 600);
+    m_config_view.rendering_distance =
+        m_config.get("world.rendering_distance", 24);
+    m_theme = m_config.get("devpanel.theme", 0);
     if (m_theme != 1 && m_theme != 0) {
         m_theme = 0;
     }
-    m_config.aniso = config.val_view("texture.aniso").value_or(1);
-    m_config.max_aniso = m_app.texture_manager().max_aniso();
-    if (m_config.aniso <= 1) {
-        m_config.is_enable_aniso = false;
+    m_config_view.aniso = m_config.get("texture.aniso", 1);
+    m_config_view.max_aniso = m_app.texture_manager().max_aniso();
+    if (m_config_view.aniso <= 1) {
+        m_config_view.is_enable_aniso = false;
     } else {
-        m_config.is_enable_aniso = true;
+        m_config_view.is_enable_aniso = true;
     }
-    m_config.volume_music =
-        static_cast<float>(config.val_view("volume.music").value_or(1.0));
-    m_config.volume_sfx =
-        static_cast<float>(config.val_view("volume.SFX").value_or(1.0));
+    m_config_view.volume_music = m_config.get("volume.music", 1.0f);
+    m_config_view.volume_sfx = m_config.get("volume.SFX", 1.0f);
 }
 void DevPanel::update_player_profile() {
     if (!m_player) {
diff --git a/src/gameplay/client_player.cpp b/src/gameplay/client_player.cpp
index f1a0ccb..0e0acab 100644
--- a/src/gameplay/client_player.cpp
+++ b/src/gameplay/client_player.cpp
@@ -121,9 +121,8 @@ void ClientPlayer::change_mode(GameMode mode) {
     }
 }
 void ClientPlayer::hot_reload() {
-    auto& config = Config::get();
-    m_sensitivity =
-        static_cast<float>(config.get<double>("player.mouse_sensitivity"));
+    auto& config = m_world.get_config();
+    m_sensitivity = config.get("player.mouse_sensitivity", 0.15f);
 }
 void ClientPlayer::set_player_pos(const glm::vec3& pos) { m_player_pos = pos; }
 
@@ -562,7 +561,7 @@ const ClientPlayer::ChunkPosSet& ClientPlayer::get_chunk_pos_set() const {
     return m_player_chunk_pos_set;
 }
 
-ClientPlayer::ChunkPosSet& ClientPlayer::get_chunk_pos_set() {
+ClientPlayer::ChunkPosSet ClientPlayer::get_chunk_pos_set() {
     std::lock_guard lock(m_chunk_pos_mutex);
     return m_player_chunk_pos_set;
 }
diff --git a/src/gameplay/client_world.cpp b/src/gameplay/client_world.cpp
index f75b4a8..d44e5de 100644
--- a/src/gameplay/client_world.cpp
+++ b/src/gameplay/client_world.cpp
@@ -21,15 +21,26 @@ struct ChunkRenderData {
 };
 } // namespace
 
-ClientWorld::ClientWorld(AudioEngine& auido)
-    : m_player(*this), m_audio(auido) {}
+ClientWorld::ClientWorld(AudioEngine& auido, Config& config)
+    : m_player(*this), m_audio(auido), m_config(config) {}
 
 ClientWorld::~ClientWorld() {
+    m_client->close();
+
     stop_client_thread();
     stop_thread_pool();
+    // Must first clean up and push the generated chunk data into
+    // m_pending_delete_vbo and m_pending_delete_vao; cannot delete them in the
+    // destructor, otherwise it will cause leaks and use-after-free.
+    m_dirty_chunk_queue.clear();
+    m_pending_upload_queue.clear();
 
     m_chunks.clear();
 
+    if (m_is_pending_delete_queue_free.exchange(true)) {
+        return;
+    }
+
     {
         std::lock_guard lk(m_delete_vbo_mutex);
         m_pending_delete_vbo.clear();
@@ -262,10 +273,18 @@ void ClientWorld::set_block(const glm::ivec3& block_pos, unsigned id) {
     }
 }
 void ClientWorld::push_delete_vbo(std::unique_ptr<VertexBuffer>& vbo) {
+    if (m_is_pending_delete_queue_free) {
+        Logger::error("Push delete vbo Use After Free");
+        return;
+    }
     std::lock_guard lk(m_delete_vbo_mutex);
     m_pending_delete_vbo.push_back(std::move(vbo));
 }
 void ClientWorld::push_delete_vao(std::unique_ptr<VertexArray>& vao) {
+    if (m_is_pending_delete_queue_free) {
+        Logger::error("Push delete vao Use After Free");
+        return;
+    }
     std::lock_guard lk(m_delete_vao_mutex);
     m_pending_delete_vao.push_back(std::move(vao));
 }
@@ -504,8 +523,7 @@ void ClientWorld::change_pool_threads(int threads) {
 }
 
 void ClientWorld::hot_reload() {
-    auto& config = Config::get();
-    int dist = config.get<int>("world.rendering_distance");
+    int dist = m_config.get<int>("world.rendering_distance", PRE_LOAD_DISTANCE);
     Logger::info("Get Config Randering dist {}", dist);
     m_rendering_distance = dist <= MAX_DISTANCE ? dist : MAX_DISTANCE;
     request_chunk();
@@ -591,7 +609,7 @@ void ClientWorld::request_chunk() {
         }
     }
 
-    ChunkPosSet old = std::move(m_player.get_chunk_pos_set());
+    ChunkPosSet old = m_player.get_chunk_pos_set();
     m_player.update_chunk_set(required_chunks);
 
     ChunkPosVector need_send_pos;
@@ -699,6 +717,7 @@ AABB ClientWorld::get_block_aabb(const glm::ivec3& pos) {
 }
 
 AudioEngine& ClientWorld::get_audio() { return m_audio; }
+Config& ClientWorld::get_config() { return m_config; }
 
 void ClientWorld::request_exit() {
     if (m_receive_exit) {
diff --git a/src/gameplay/network_server.cpp b/src/gameplay/network_server.cpp
index 9e696c8..39d1ca5 100644
--- a/src/gameplay/network_server.cpp
+++ b/src/gameplay/network_server.cpp
@@ -4,7 +4,10 @@
 using asio::ip::tcp;
 namespace Cubed {
 
-NetworkServer::NetworkServer(int port) : m_port(port) {}
+NetworkServer::NetworkServer()
+    : m_config(ASSETS_PATH "server-config.toml"), m_world(m_config) {
+    m_port = m_config.get("port", 25530);
+}
 
 NetworkServer::~NetworkServer() { stop(); }
 
@@ -84,6 +87,11 @@ void NetworkServer::net_run() {
 
 void NetworkServer::start_server(int port) {
     m_port = port;
+    m_config.set("port", m_port);
+    start_server();
+}
+
+void NetworkServer::start_server() {
     m_world.init_world();
     net_run();
     m_started = true;
diff --git a/src/gameplay/server_world.cpp b/src/gameplay/server_world.cpp
index 4b99234..b75552b 100644
--- a/src/gameplay/server_world.cpp
+++ b/src/gameplay/server_world.cpp
@@ -1,6 +1,5 @@
 #include "Cubed/gameplay/server_world.hpp"
 
-#include "Cubed/config.hpp"
 #include "Cubed/gameplay/packet.hpp"
 #include "Cubed/gameplay/session.hpp"
 #include "Cubed/tools/cubed_assert.hpp"
@@ -14,7 +13,7 @@ using namespace std::chrono_literals;
 using namespace google::protobuf;
 
 namespace Cubed {
-ServerWorld::ServerWorld() {}
+ServerWorld::ServerWorld(Config& config) : m_config(config) {}
 
 ServerWorld::~ServerWorld() { stop(); }
 
@@ -501,8 +500,7 @@ bool ServerWorld::set_block(const glm::ivec3& block_pos, unsigned id) {
 }
 
 void ServerWorld::hot_reload() {
-    auto& config = Config::get();
-    int dist = config.get<int>("world.rendering_distance");
+    int dist = m_config.get("server_distance", 24);
     m_rendering_distance = dist <= MAX_DISTANCE ? dist : MAX_DISTANCE;
 }
 
diff --git a/src/map_table.cpp b/src/map_table.cpp
deleted file mode 100644
index 35088dc..0000000
--- a/src/map_table.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-#include "Cubed/map_table.hpp"
-
-namespace Cubed {
-/*
-std::string_view MapTable::get_name_from_id(unsigned id) {
-    auto it = id_to_name_map.find(id);
-    ASSERT_MSG(it != id_to_name_map.end(),
-               "Id: " + std::to_string(id) + " is not exist");
-    return it->second;
-}
-
-unsigned MapTable::get_id_from_name(const std::string& name) {
-    auto it = name_to_id_map.find(HASH::str(name));
-    ASSERT_MSG(it != name_to_id_map.end(), "Name " + name + " is not exist");
-    return it->second;
-}
-
-std::string_view MapTable::item_name(unsigned id) {
-    ASSERT_MSG(id < item_id_to_name.size(), "ID is invalid");
-    return item_id_to_name[id];
-}
-
-const std::vector<std::string>& MapTable::item_map() { return item_id_to_name; }
- */
-void MapTable::init_map() {
-    /*
-    id_to_name_map.reserve(MAX_BLOCK_NUM);
-    name_to_id_map.reserve(MAX_BLOCK_NUM);
-
-    for (int i = 0; i < MAX_BLOCK_NUM; i++) {
-        id_to_name_map[i] = BLOCK_REISTER[i];
-        name_to_id_map[HASH::str(BLOCK_REISTER[i])] = i;
-    }
-    for (auto s : BLOCK_REISTER) {
-        item_id_to_name.emplace_back(s);
-    }
-        */
-}
-
-} // namespace Cubed
diff --git a/src/render/renderer.cpp b/src/render/renderer.cpp
index 8cc4ba1..eab6096 100644
--- a/src/render/renderer.cpp
+++ b/src/render/renderer.cpp
@@ -20,10 +20,11 @@
 namespace Cubed {
 
 Renderer::Renderer(const Camera& camera, ClientWorld& world,
-                   const TextureManager& texture_manager, DevPanel& dev_panel)
+                   const TextureManager& texture_manager, DevPanel& dev_panel,
+                   Config& config)
     : m_camera(camera), m_dev_panel(dev_panel),
       m_texture_manager(texture_manager), m_world(world),
-      m_world_renderer(*this) {}
+      m_world_renderer(*this), m_config(config) {}
 
 Renderer::~Renderer() {
     if (m_init) {
@@ -38,10 +39,7 @@ Renderer::~Renderer() {
     }
 }
 
-void Renderer::hot_reload() {
-    auto& config = Config::get();
-    update_fov(config.get<double>("player.fov"));
-}
+void Renderer::hot_reload() { update_fov(m_config.get("player.fov", 70.0f)); }
 
 void Renderer::init(bool debug_on) {
     if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
diff --git a/src/texture_manager.cpp b/src/texture_manager.cpp
index 7df233a..91ab0e8 100644
--- a/src/texture_manager.cpp
+++ b/src/texture_manager.cpp
@@ -2,7 +2,6 @@
 
 #include "Cubed/config.hpp"
 #include "Cubed/constants.hpp"
-#include "Cubed/map_table.hpp"
 #include "Cubed/tools/cubed_assert.hpp"
 #include "Cubed/tools/log.hpp"
 #include "Cubed/tools/shader_tools.hpp"
@@ -32,7 +31,7 @@ unsigned char* generate_flat_normal_map(int width = BLOCK_NORMAL_SIZE,
 
 namespace Cubed {
 
-TextureManager::TextureManager() {}
+TextureManager::TextureManager(Config& config) : m_config(config) {}
 
 TextureManager::~TextureManager() { delete_texture(); }
 
@@ -286,10 +285,9 @@ void TextureManager::init_texture() {
         Logger::info("Support anisotropic filtering max_aniso is {}",
                      m_max_aniso);
     }
-    m_aniso = Config::get().get<int>("texture.aniso");
+    m_aniso = m_config.get("texture.aniso", 1);
     m_aniso = std::min(static_cast<int>(m_max_aniso), m_aniso);
     Logger::info("Setting Texture Aniso is {}", m_aniso);
-    MapTable::init_map();
     Logger::info("Map Init Success");
 
     init_block();
diff --git a/src/window.cpp b/src/window.cpp
index 45e1fd1..3343231 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1,6 +1,5 @@
 #include "Cubed/window.hpp"
 
-#include "Cubed/config.hpp"
 #include "Cubed/render/renderer.hpp"
 #include "Cubed/tools/cubed_assert.hpp"
 #include "Cubed/tools/font.hpp"
@@ -15,7 +14,8 @@ namespace Cubed {
 static int windowed_xpos = 0, windowed_ypos = 0;
 static int windowed_width = 800, windowed_height = 600;
 
-Window::Window(Renderer& renderer) : m_renderer(renderer) {}
+Window::Window(Renderer& renderer, Config& config)
+    : m_renderer(renderer), m_config(config) {}
 
 Window::~Window() {
     if (m_imgui_init) {
@@ -47,9 +47,8 @@ void Window::update_viewport() {
     glViewport(0, 0, m_width, m_height);
     m_renderer.update_proj_matrix(m_aspect, m_width, m_height);
     m_renderer.updata_framebuffer(m_width, m_height);
-    auto& config = Config::get();
-    config.set("window.width", windowed_width);
-    config.set("window.height", windowed_height);
+    m_config.set("window.width", windowed_width);
+    m_config.set("window.height", windowed_height);
 }
 
 void Window::init() {
@@ -61,10 +60,9 @@ void Window::init() {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
     glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
-    auto& config = Config::get();
-    m_width = config.get<int>("window.width");
-    m_height = config.get<int>("window.height");
-    if (config.get<bool>("window.fullscreen")) {
+    m_width = m_config.get("window.width", 800);
+    m_height = m_config.get("window.height", 600);
+    if (m_config.get("window.fullscreen", false)) {
         GLFWmonitor* primary_monitor = glfwGetPrimaryMonitor();
         const GLFWvidmode* mode = glfwGetVideoMode(primary_monitor);
         m_window = glfwCreateWindow(mode->width, mode->height, "Cubed",
@@ -74,7 +72,7 @@ void Window::init() {
     }
 
     glfwMakeContextCurrent(m_window);
-    if (config.get<bool>("window.V-Sync")) {
+    if (m_config.get("window.V-Sync", true)) {
         glfwSwapInterval(1);
     } else {
         glfwSwapInterval(0);
@@ -94,18 +92,17 @@ void Window::init() {
 }
 
 void Window::hot_reload() {
-    auto& config = Config::get();
     // V-Sync
-    if (config.get<bool>("window.V-Sync")) {
+    if (m_config.get("window.V-Sync", true)) {
         glfwSwapInterval(1);
     } else {
         glfwSwapInterval(0);
     }
     // Window
-    windowed_width = config.get<int>("window.width");
-    windowed_height = config.get<int>("window.height");
+    windowed_width = m_config.get("window.width", 800);
+    windowed_height = m_config.get("window.height", 600);
 
-    if (config.get<bool>("window.fullscreen")) {
+    if (m_config.get("window.fullscreen", false)) {
         glfwGetWindowPos(m_window, &windowed_xpos, &windowed_ypos);
         glfwGetWindowSize(m_window, &windowed_width, &windowed_height);
 
@@ -134,13 +131,12 @@ void Window::hot_reload() {
 
 void Window::toggle_fullscreen() {
 
-    auto& config = Config::get();
     GLFWmonitor* monitor = glfwGetWindowMonitor(m_window);
     if (monitor != nullptr) {
         glfwSetWindowMonitor(m_window, nullptr, windowed_xpos, windowed_ypos,
                              windowed_width, windowed_height, 0);
 
-        config.set("window.fullscreen", false);
+        m_config.set("window.fullscreen", false);
     } else {
         glfwGetWindowPos(m_window, &windowed_xpos, &windowed_ypos);
         glfwGetWindowSize(m_window, &windowed_width, &windowed_height);
@@ -150,7 +146,7 @@ void Window::toggle_fullscreen() {
 
         glfwSetWindowMonitor(m_window, primary, 0, 0, mode->width, mode->height,
                              GL_DONT_CARE);
-        config.set("window.fullscreen", true);
+        m_config.set("window.fullscreen", true);
     }
     update_viewport();
 }
@@ -194,14 +190,14 @@ void Window::imgui_init() {
                                               // the game to fully control
                                               // cursor appearance (e.g.,
                                               // hidden/disabled custom cursor).
-    auto theme = Config::get().get<int>("devpanel.theme");
+    auto theme = m_config.get("devpanel.theme", 0);
     if (theme == 0) {
         ImGui::StyleColorsDark();
     } else if (theme == 1) {
         ImGui::StyleColorsLight();
     } else {
         ImGui::StyleColorsDark();
-        Config::get().set("devpanel.theme", 0);
+        m_config.set("devpanel.theme", 0);
     }
 
     ImGuiStyle& style = ImGui::GetStyle();