diff --git a/Mine2d/Context.cs b/Mine2d/Context.cs
index 375f415..e1c7bf8 100644
--- a/Mine2d/Context.cs
+++ b/Mine2d/Context.cs
@@ -6,7 +6,7 @@ using mine2d.state;
 
 namespace mine2d;
 
-class Context
+public class Context
 {
     public bool IsHost { get; set; }
     public IBackend Backend { get; set; }
@@ -38,16 +38,16 @@ class Context
         this.Window = window;
         this.TileRegistry = new TileRegistry();
         this.ResourceLoader = new ResourceLoader();
-        Context.Instance = this;
+        Instance = this;
     }
 
     public static Context Get()
     {
-        if (Context.Instance == null)
+        if (Instance == null)
         {
             throw new Exception("Context not initialized");
         }
 
-        return Context.Instance;
+        return Instance;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/Controls.cs b/Mine2d/Controls.cs
index cf93aaa..1f05756 100644
--- a/Mine2d/Controls.cs
+++ b/Mine2d/Controls.cs
@@ -1,6 +1,6 @@
 namespace mine2d;
 
-enum Control
+public enum Control
 {
     Up,
     Down,
@@ -10,26 +10,19 @@ enum Control
     Confirm,
 }
 
-static class ControlKeyExtension
+public static class ControlKeyExtension
 {
     public static SDL_Keycode Key(this Control c)
     {
-        switch (c)
+        return c switch
         {
-            case Control.Up:
-                return SDL_Keycode.SDLK_w;
-            case Control.Down:
-                return SDL_Keycode.SDLK_s;
-            case Control.Left:
-                return SDL_Keycode.SDLK_a;
-            case Control.Right:
-                return SDL_Keycode.SDLK_d;
-            case Control.Stay:
-                return SDL_Keycode.SDLK_LCTRL;
-            case Control.Confirm:
-                return SDL_Keycode.SDLK_SPACE;
-            default:
-                throw new ArgumentException("Invalid control");
-        }
+            Control.Up => SDL_Keycode.SDLK_w,
+            Control.Down => SDL_Keycode.SDLK_s,
+            Control.Left => SDL_Keycode.SDLK_a,
+            Control.Right => SDL_Keycode.SDLK_d,
+            Control.Stay => SDL_Keycode.SDLK_LCTRL,
+            Control.Confirm => SDL_Keycode.SDLK_SPACE,
+            _ => throw new ArgumentException("Invalid control"),
+        };
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/Mine2d.cs b/Mine2d/Mine2d.cs
index 2e8ad2c..3a9af89 100644
--- a/Mine2d/Mine2d.cs
+++ b/Mine2d/Mine2d.cs
@@ -6,7 +6,7 @@ using mine2d.state;
 
 namespace mine2d;
 
-class Mine2d : Game
+public class Mine2d : Game
 {
     private readonly Context ctx;
 
@@ -46,4 +46,4 @@ class Mine2d : Game
     {
         this.ctx.Backend.Process(dt);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/Program.cs b/Mine2d/Program.cs
index 03d9fc4..b6399bc 100644
--- a/Mine2d/Program.cs
+++ b/Mine2d/Program.cs
@@ -1,15 +1,12 @@
 namespace mine2d;
 
-class Program
+public class Program
 {
-    static void Main(string[] args)
+    public static void Main(string[] args)
     {
-        bool isHost = args.Contains("--host");
+        var isHost = args.Contains("--host");
         // bool isHost = true;
         var game = new Mine2d(isHost);
         game.Run();
-        // var p = new Publisher(isHost ? InteractorKind.Server : InteractorKind.Client);
-        // p.Dump();
-        // Console.WriteLine("Hello World!");
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/backend/Backend.cs b/Mine2d/backend/Backend.cs
index 60fcea3..1344010 100644
--- a/Mine2d/backend/Backend.cs
+++ b/Mine2d/backend/Backend.cs
@@ -7,11 +7,11 @@ using WatsonTcp;
 
 namespace mine2d.backend;
 
-class Backend : IBackend
+public class Backend : IBackend
 {
     private WatsonTcpServer server;
     private Publisher publisher;
-    private Queue<ValueType> pendingPackets = new();
+    private readonly Queue<ValueType> pendingPackets = new();
     private uint tick;
 
     public void Process(double dt)
@@ -77,10 +77,16 @@ class Backend : IBackend
     private void SendGameState()
     {
         if (this.server == null)
+        {
             return;
+        }
+
         var clients = this.server.ListClients().ToArray();
         if (!clients.Any())
+        {
             return;
+        }
+
         var gameState = Context.Get().GameState;
         var json = JsonConvert.SerializeObject(gameState);
         var bytes = Encoding.UTF8.GetBytes(json);
@@ -89,4 +95,4 @@ class Backend : IBackend
             this.server.Send(client, bytes);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/backend/IBackend.cs b/Mine2d/backend/IBackend.cs
index ab85e6d..5886456 100644
--- a/Mine2d/backend/IBackend.cs
+++ b/Mine2d/backend/IBackend.cs
@@ -1,8 +1,8 @@
 namespace mine2d.backend;
 
-interface IBackend
+public interface IBackend
 {
     public void Process(double dt);
     public void ProcessPacket(ValueType packet);
     public void Init();
-}
\ No newline at end of file
+}
diff --git a/Mine2d/backend/Publisher.cs b/Mine2d/backend/Publisher.cs
index 0407e96..beb520a 100644
--- a/Mine2d/backend/Publisher.cs
+++ b/Mine2d/backend/Publisher.cs
@@ -5,7 +5,7 @@ using mine2d.engine.system.annotations;
 
 namespace mine2d.backend;
 
-class Publisher
+public class Publisher
 {
     private readonly Dictionary<string, HashSet<Delegate>> subscribers =
         new();
@@ -24,7 +24,7 @@ class Publisher
             .GetTypesSafe();
         foreach (var type in types)
         {
-            var attrs = type.GetCustomAttributes(typeof(Interactor), false);
+            var attrs = type.GetCustomAttributes(typeof(InteractorAttribute), false);
             if (attrs.Length == 0)
             {
                 continue;
@@ -32,12 +32,12 @@ class Publisher
             var methods = type.GetMethods();
             foreach (var method in methods)
             {
-                var attrs2 = method.GetCustomAttributes(typeof(Interaction), false);
+                var attrs2 = method.GetCustomAttributes(typeof(InteractionAttribute), false);
                 if (attrs2.Length == 0)
                 {
                     continue;
                 }
-                var attr = (Interaction)attrs2[0];
+                var attr = (InteractionAttribute)attrs2[0];
                 if (attr.Kind != this.kind && this.kind != InteractorKind.Hybrid)
                 {
                     continue;
diff --git a/Mine2d/backend/interactor/Breaking.cs b/Mine2d/backend/interactor/Breaking.cs
index 5c44f77..c52c24d 100644
--- a/Mine2d/backend/interactor/Breaking.cs
+++ b/Mine2d/backend/interactor/Breaking.cs
@@ -4,10 +4,10 @@ using mine2d.engine.system.annotations;
 
 namespace mine2d.backend.interactor;
 
-[Interactor]
+[InteractorAttribute]
 public class Breaking
 {
-    [Interaction(InteractorKind.Hybrid, "tick")]
+    [InteractionAttribute(InteractorKind.Hybrid, "tick")]
     public static void TickHybrid()
     {
         var ctx = Context.Get();
@@ -35,11 +35,11 @@ public class Breaking
         );
     }
 
-    [Interaction(InteractorKind.Server, "break")]
+    [InteractionAttribute(InteractorKind.Server, "break")]
     public static void BreakServer(BreakPacket packet)
     {
         var ctx = Context.Get();
-        var player = ctx.GameState.Players.Find(p => p.Guid == packet.PlayerGuid);
+        var player = ctx.GameState.Players.Find(p => p.Id == packet.PlayerGuid);
         if (player == null)
         {
             return;
diff --git a/Mine2d/backend/interactor/Connect.cs b/Mine2d/backend/interactor/Connect.cs
index ed8ed22..636dc39 100644
--- a/Mine2d/backend/interactor/Connect.cs
+++ b/Mine2d/backend/interactor/Connect.cs
@@ -4,10 +4,10 @@ using mine2d.state;
 
 namespace mine2d.backend.interactor;
 
-[Interactor]
-class Connect
+[InteractorAttribute]
+public class Connect
 {
-    [Interaction(InteractorKind.Server, "connect")]
+    [InteractionAttribute(InteractorKind.Server, "connect")]
     public static void ConnectServer(ConnectPacket packet)
     {
         var ctx = Context.Get();
@@ -18,11 +18,11 @@ class Connect
                 new Player
                 {
                     Name = packet.PlayerName,
-                    Guid = packet.PlayerGuid,
+                    Id = packet.PlayerGuid,
                     Position = new Vector2(20, 16 * 16),
                     Movement = new Vector2(0, 0)
                 }
             );
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/backend/interactor/Move.cs b/Mine2d/backend/interactor/Move.cs
index f77ad1b..61adebb 100644
--- a/Mine2d/backend/interactor/Move.cs
+++ b/Mine2d/backend/interactor/Move.cs
@@ -4,10 +4,10 @@ using mine2d.engine.system.annotations;
 
 namespace mine2d.backend.interactor;
 
-[Interactor]
-class Move
+[InteractorAttribute]
+public class Move
 {
-    [Interaction(InteractorKind.Hybrid, "move")]
+    [InteractionAttribute(InteractorKind.Hybrid, "move")]
     public static void MoveHybrid(MovePacket packet)
     {
         var ctx = Context.Get();
@@ -18,16 +18,16 @@ class Move
         }
     }
 
-    [Interaction(InteractorKind.Hybrid, "tick")]
-    public static void TickHybrid(TickPacket packet)
+    [InteractionAttribute(InteractorKind.Hybrid, "tick")]
+    public static void TickHybrid()
     {
         var ctx = Context.Get();
         ctx.GameState.Players.ForEach(PlayerEntity.Move);
         ctx.GameState.Players.ForEach(PlayerEntity.Collide);
     }
 
-    [Interaction(InteractorKind.Client, "tick")]
-    public static void SelfMovedClient(TickPacket packet)
+    [InteractionAttribute(InteractorKind.Client, "tick")]
+    public static void SelfMovedClient()
     {
         var camera = Context.Get().FrontendGameState.Camera;
         camera.CenterOn(PlayerEntity.GetSelf().Position);
diff --git a/Mine2d/core/Bootstrapper.cs b/Mine2d/core/Bootstrapper.cs
index b733e37..9564888 100644
--- a/Mine2d/core/Bootstrapper.cs
+++ b/Mine2d/core/Bootstrapper.cs
@@ -4,7 +4,7 @@ using mine2d.core.world;
 
 namespace mine2d.core;
 
-class Bootstrapper
+public class Bootstrapper
 {
     public static void Bootstrap()
     {
@@ -14,4 +14,4 @@ class Bootstrapper
         ctx.GameState.World.AddChunk(ChunkGenerator.CreateFilledChunk(1, 1, STile.From(Tiles.Stone)));
         ctx.GameState.World.AddChunk(ChunkGenerator.CreateFilledChunk(1, 0, STile.From(Tiles.Stone)));
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/Camera.cs b/Mine2d/core/Camera.cs
index 1a4ff24..da92c8f 100644
--- a/Mine2d/core/Camera.cs
+++ b/Mine2d/core/Camera.cs
@@ -1,8 +1,8 @@
 namespace mine2d.core;
 
-class Camera
+public class Camera
 {
-    public Vector2 Position;
+    public Vector2 Position { get; set; }
 
     public Camera()
     {
@@ -17,4 +17,4 @@ class Camera
         var windowHeight = ctx.FrontendGameState.WindowHeight;
         this.Position = target - (new Vector2(windowWidth, windowHeight) / 2) / scale;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/Constants.cs b/Mine2d/core/Constants.cs
index 758f520..d0fc1e1 100644
--- a/Mine2d/core/Constants.cs
+++ b/Mine2d/core/Constants.cs
@@ -1,8 +1,8 @@
 namespace mine2d.core;
 
-class Constants
+public class Constants
 {
     public const int ChunkSize = 32;
     public const int TileSize = 16;
-    public static Vector2 Gravity = new Vector2(0, 0.1f);
-}
\ No newline at end of file
+    public static Vector2 Gravity = new(0, 0.1f);
+}
diff --git a/Mine2d/core/PlayerEntity.cs b/Mine2d/core/PlayerEntity.cs
index 5014c84..1030881 100644
--- a/Mine2d/core/PlayerEntity.cs
+++ b/Mine2d/core/PlayerEntity.cs
@@ -2,18 +2,18 @@ using mine2d.state;
 
 namespace mine2d.core;
 
-class PlayerEntity
+public class PlayerEntity
 {
     public static bool IsSelf(Player p)
     {
-        return p.Guid == GetSelf().Guid;
+        return p.Id == GetSelf().Id;
     }
 
     public static Player GetSelf()
     {
         var ctx = Context.Get();
         var player = ctx.GameState.Players.FirstOrDefault(
-            p => p.Guid == ctx.FrontendGameState.PlayerGuid
+            p => p.Id == ctx.FrontendGameState.PlayerGuid
         );
         return player;
     }
@@ -77,4 +77,4 @@ class PlayerEntity
             }
         } while (hasCollision);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/data/Chunk.cs b/Mine2d/core/data/Chunk.cs
index 8b7fd85..ecbfe45 100644
--- a/Mine2d/core/data/Chunk.cs
+++ b/Mine2d/core/data/Chunk.cs
@@ -1,6 +1,6 @@
 namespace mine2d.core.data;
 
-class Chunk
+public class Chunk
 {
     public STile[,] Tiles { get; set; } = new STile[Constants.ChunkSize, Constants.ChunkSize];
     public int X { get; set; }
@@ -76,4 +76,4 @@ class Chunk
         return pos - new Vector2(this.X * Constants.ChunkSize * Constants.TileSize,
             this.Y * Constants.ChunkSize * Constants.TileSize);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/data/STile.cs b/Mine2d/core/data/STile.cs
index 9e87155..ed16077 100644
--- a/Mine2d/core/data/STile.cs
+++ b/Mine2d/core/data/STile.cs
@@ -2,7 +2,7 @@ using mine2d.core.tiles;
 
 namespace mine2d.core.data;
 
-struct STile
+public struct STile
 {
     public int Id { get; set; }
     public int Hits { get; set; }
@@ -19,4 +19,4 @@ struct STile
     {
         return From((int)id);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/data/World.cs b/Mine2d/core/data/World.cs
index f0035f9..9c5da70 100644
--- a/Mine2d/core/data/World.cs
+++ b/Mine2d/core/data/World.cs
@@ -1,6 +1,6 @@
 namespace mine2d.core.data;
 
-class World
+public class World
 {
     public Dictionary<string, Chunk> Chunks { get; set; } = new Dictionary<string, Chunk>();
 
@@ -79,4 +79,4 @@ class World
     {
         return this.HasChunkAt(x, y) && this.GetChunkAt(x, y).HasTileAt(new Vector2(x, y));
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/tiles/Tile.cs b/Mine2d/core/tiles/Tile.cs
index d12fc31..ae3a730 100644
--- a/Mine2d/core/tiles/Tile.cs
+++ b/Mine2d/core/tiles/Tile.cs
@@ -2,7 +2,7 @@ using mine2d.core.data;
 
 namespace mine2d.core.tiles;
 
-class Tile
+public class Tile
 {
     public string Name { get; set; }
     public int Hardness { get; set; }
@@ -68,4 +68,4 @@ class Tile
         breakingTexture = Context.Get().Renderer.CreateTextureFromSurface(surface);
         SDL_FreeSurface(surface);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/tiles/TileRegistry.cs b/Mine2d/core/tiles/TileRegistry.cs
index bfacc08..448e56b 100644
--- a/Mine2d/core/tiles/TileRegistry.cs
+++ b/Mine2d/core/tiles/TileRegistry.cs
@@ -1,11 +1,11 @@
 namespace mine2d.core.tiles;
 
-enum Tiles
+public enum Tiles
 {
     Stone = 1,
 }
 
-class TileRegistry
+public class TileRegistry
 {
     public Dictionary<int, Tile> Tiles { get; set; } = new();
 
@@ -18,4 +18,4 @@ class TileRegistry
     {
         return this.Tiles[id];
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/core/world/ChunkGenerator.cs b/Mine2d/core/world/ChunkGenerator.cs
index eb5bd75..ef78bd4 100644
--- a/Mine2d/core/world/ChunkGenerator.cs
+++ b/Mine2d/core/world/ChunkGenerator.cs
@@ -2,7 +2,7 @@ using mine2d.core.data;
 
 namespace mine2d.core.world;
 
-class ChunkGenerator
+public class ChunkGenerator
 {
     public static Chunk CreateFilledChunk(int x, int y, STile fill)
     {
@@ -16,4 +16,4 @@ class ChunkGenerator
         }
         return chunk;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/AudioPlayer.cs b/Mine2d/engine/AudioPlayer.cs
index 9999ada..8ebe665 100644
--- a/Mine2d/engine/AudioPlayer.cs
+++ b/Mine2d/engine/AudioPlayer.cs
@@ -1,15 +1,15 @@
 namespace mine2d.engine;
 
-enum Sound { }
+public enum Sound { }
 
-class AudioPlayer
+public class AudioPlayer
 {
-    private Dictionary<Sound, byte[]> audioFiles = new();
-    private ResourceLoader resourceLoader = new();
+    private readonly Dictionary<Sound, byte[]> audioFiles = new();
+    private readonly ResourceLoader resourceLoader = new();
 
     public AudioPlayer()
     {
-        SDL2.SDL_mixer.Mix_OpenAudio(44100, SDL2.SDL_mixer.MIX_DEFAULT_FORMAT, 2, 2048);
+        _ = SDL2.SDL_mixer.Mix_OpenAudio(44100, SDL2.SDL_mixer.MIX_DEFAULT_FORMAT, 2, 2048);
     }
 
     public void Register(Sound name, string path)
@@ -24,4 +24,4 @@ class AudioPlayer
         var sound = SDL2.SDL_mixer.Mix_QuickLoad_WAV(buffer);
         SDL2.SDL_mixer.Mix_PlayChannel((int)name, sound, 0);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/FontManager.cs b/Mine2d/engine/FontManager.cs
index f5075a2..b9082ae 100644
--- a/Mine2d/engine/FontManager.cs
+++ b/Mine2d/engine/FontManager.cs
@@ -1,29 +1,34 @@
+using Mine2d.engine;
+
 namespace mine2d.engine;
 
-class FontManager
+public class FontManager
 {
-    private Dictionary<string, IntPtr> fonts = new();
-    private ResourceLoader resourceLoader;
+    private readonly Dictionary<string, IntPtr> fonts = new();
+    private readonly ResourceLoader resourceLoader;
 
     public FontManager(ResourceLoader resourceLoader)
     {
         this.resourceLoader = resourceLoader;
         if (TTF_Init() != 0)
         {
-            throw new Exception("TTF_Init failed");
+            throw new SDLException(TTF_GetError());
         }
     }
 
     public void RegisterFont(string name, string path, int fontSize)
     {
         if (this.fonts.ContainsKey(name))
+        {
             return;
-        var res = this.resourceLoader.LoadToIntPtr(path);
-        var sdlBuffer = SDL_RWFromConstMem(res.ptr, res.size);
+        }
+
+        var (ptr, size) = this.resourceLoader.LoadToIntPtr(path);
+        var sdlBuffer = SDL_RWFromConstMem(ptr, size);
         var font = TTF_OpenFontRW(sdlBuffer, 1, fontSize);
         if (font == IntPtr.Zero)
         {
-            throw new Exception("TTF_OpenFont failed");
+            throw new SDLException(TTF_GetError());
         }
         this.fonts.Add(name, font);
     }
@@ -32,4 +37,4 @@ class FontManager
     {
         return this.fonts[name];
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/Game.cs b/Mine2d/engine/Game.cs
index 878c618..89c7579 100644
--- a/Mine2d/engine/Game.cs
+++ b/Mine2d/engine/Game.cs
@@ -1,11 +1,11 @@
 namespace mine2d.engine;
 
-abstract class Game
+public abstract class Game
 {
     public const int Tps = 128;
 
-    private bool running = true;
-    private Queue<int> fpsQueue = new();
+    private readonly bool running = true;
+    private readonly Queue<int> fpsQueue = new();
     protected abstract void Update(double dt);
     protected abstract void Draw();
 
@@ -21,7 +21,10 @@ abstract class Game
             var fps = (int)(1 / dt.TotalSeconds);
             this.fpsQueue.Enqueue(fps);
             while (this.fpsQueue.Count > fps)
+            {
                 this.fpsQueue.Dequeue();
+            }
+
             while (tAcc >= TimeSpan.FromSeconds(1.0 / Tps))
             {
                 this.Update(dt.TotalSeconds);
@@ -31,4 +34,4 @@ abstract class Game
             this.Draw();
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/Renderer.cs b/Mine2d/engine/Renderer.cs
index 7da56a5..3c259fe 100644
--- a/Mine2d/engine/Renderer.cs
+++ b/Mine2d/engine/Renderer.cs
@@ -1,8 +1,9 @@
 using mine2d.engine.utils;
+using Mine2d.engine;
 
 namespace mine2d.engine;
 
-class Renderer
+public class Renderer
 {
     private readonly IntPtr renderer;
     private IntPtr font;
@@ -15,12 +16,16 @@ class Renderer
             -1,
             SDL_RendererFlags.SDL_RENDERER_ACCELERATED
         );
+        if (this.renderer == IntPtr.Zero)
+        {
+            throw new SDLException(SDL_GetError());
+        }
     }
 
     public void Clear()
     {
-        SDL_SetRenderDrawColor(this.renderer, 0, 0, 0, 255);
-        SDL_RenderClear(this.renderer);
+        ProcessStatus(SDL_SetRenderDrawColor(this.renderer, 0, 0, 0, 255));
+        ProcessStatus(SDL_RenderClear(this.renderer));
     }
 
     public void Present()
@@ -43,7 +48,7 @@ class Renderer
             h = h
         };
 
-        SDL_RenderFillRect(this.renderer, ref rect);
+        ProcessStatus(SDL_RenderFillRect(this.renderer, ref rect));
     }
 
     public void DrawOutline(int x, int y, int w, int h)
@@ -56,7 +61,7 @@ class Renderer
             h = h
         };
 
-        _ = SDL_RenderDrawRect(this.renderer, ref rect);
+        ProcessStatus(SDL_RenderDrawRect(this.renderer, ref rect));
     }
 
     public void DrawLines(double[][] points)
@@ -68,12 +73,12 @@ class Renderer
             sdlPoints[i].y = (int)points[i][1];
         }
 
-        SDL_RenderDrawLines(this.renderer, sdlPoints, points.Length);
+        ProcessStatus(SDL_RenderDrawLines(this.renderer, sdlPoints, points.Length));
     }
 
     public void SetColor(int r, int g, int b, int a = 255)
     {
-        SDL_SetRenderDrawColor(this.renderer, (byte)r, (byte)g, (byte)b, (byte)a);
+        ProcessStatus(SDL_SetRenderDrawColor(this.renderer, (byte)r, (byte)g, (byte)b, (byte)a));
     }
 
     public void SetFont(IntPtr font, SDL_Color color)
@@ -93,7 +98,7 @@ class Renderer
         var surfaceMessage = TTF_RenderText_Solid(this.font, text, this.color);
         var texture = SDL_CreateTextureFromSurface(this.renderer, surfaceMessage);
 
-        SDL_QueryTexture(texture, out _, out _, out var width, out var height);
+        ProcessStatus(SDL_QueryTexture(texture, out _, out _, out var width, out var height));
 
         var rect = new SDL_Rect
         {
@@ -109,7 +114,7 @@ class Renderer
             rect.y -= height / 2;
         }
 
-        SDL_RenderCopy(this.renderer, texture, IntPtr.Zero, ref rect);
+        ProcessStatus(SDL_RenderCopy(this.renderer, texture, IntPtr.Zero, ref rect));
         SDL_DestroyTexture(texture);
         SDL_FreeSurface(surfaceMessage);
     }
@@ -133,7 +138,7 @@ class Renderer
             w = w,
             h = h
         };
-        _ = SDL_RenderCopy(this.renderer, texture, IntPtr.Zero, ref rect);
+        ProcessStatus(SDL_RenderCopy(this.renderer, texture, IntPtr.Zero, ref rect));
     }
 
     public void DrawTexture(IntPtr texture, int x, int y, int w, int h, int offsetIndex, int srcWidth, int srcHeight)
@@ -152,6 +157,14 @@ class Renderer
             w = srcWidth,
             h = srcHeight,
         };
-        _ = SDL_RenderCopy(this.renderer, texture, ref srcRect, ref rect);
+        ProcessStatus(SDL_RenderCopy(this.renderer, texture, ref srcRect, ref rect));
     }
-}
\ No newline at end of file
+
+    public static void ProcessStatus(int status)
+    {
+        if (status != 0)
+        {
+            throw new SDLException(SDL_GetError());
+        }
+    }
+}
diff --git a/Mine2d/engine/ResourceLoader.cs b/Mine2d/engine/ResourceLoader.cs
index 20647bb..c936dba 100644
--- a/Mine2d/engine/ResourceLoader.cs
+++ b/Mine2d/engine/ResourceLoader.cs
@@ -2,18 +2,18 @@ using System.Runtime.InteropServices;
 
 namespace mine2d.engine;
 
-class ResourceLoader
+public class ResourceLoader
 {
-    private string assemblyName;
+    private readonly string assemblyName;
 
     public ResourceLoader()
     {
         this.assemblyName = this.GetType().Assembly.GetName().Name!;
     }
 
-    public string LoadString(string resourceName)
+    public static string LoadString(string resourceName)
     {
-#if (DEBUG)
+#if DEBUG
         Console.WriteLine("Loading resource: " + resourceName);
         return File.ReadAllText(ToPath(resourceName));
 #else
@@ -41,7 +41,7 @@ class ResourceLoader
         return (ptr, bytes.Length);
     }
 
-    public void SaveString(string resourceName, string content)
+    public static void SaveString(string resourceName, string content)
     {
         using var stream = new StreamWriter(ToPath(resourceName));
         stream.Write(content);
@@ -50,6 +50,6 @@ class ResourceLoader
     private static string ToPath(string resourceName)
     {
         var s = resourceName.Split('.');
-        return String.Join('/', s[..^1]) + "." + s[^1];
+        return string.Join('/', s[..^1]) + "." + s[^1];
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/SDLException.cs b/Mine2d/engine/SDLException.cs
new file mode 100644
index 0000000..02a4dd5
--- /dev/null
+++ b/Mine2d/engine/SDLException.cs
@@ -0,0 +1,8 @@
+namespace Mine2d.engine;
+
+public class SDLException : Exception
+{
+    public SDLException(string message) : base(message)
+    {
+    }
+}
diff --git a/Mine2d/engine/Shapes.cs b/Mine2d/engine/Shapes.cs
index 79d6a2a..6af8e56 100644
--- a/Mine2d/engine/Shapes.cs
+++ b/Mine2d/engine/Shapes.cs
@@ -1,13 +1,13 @@
 namespace mine2d.engine;
 
-struct Line
+public struct Line
 {
-    public Vector2 Start;
-    public Vector2 End;
+    public Vector2 Start { get; set; }
+    public Vector2 End { get; set; }
 
     public Line(Vector2 start, Vector2 end)
     {
         this.Start = start;
         this.End = end;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/Window.cs b/Mine2d/engine/Window.cs
index bf04f0b..1cebe81 100644
--- a/Mine2d/engine/Window.cs
+++ b/Mine2d/engine/Window.cs
@@ -1,8 +1,8 @@
 namespace mine2d.engine;
 
-class Window
+public class Window
 {
-    IntPtr window;
+    private readonly IntPtr window;
 
     public Window(string title, int w, int h)
     {
@@ -33,9 +33,7 @@ class Window
 
     public (int width, int height) GetSize()
     {
-        int w,
-            h;
-        SDL_GetWindowSize(this.window, out w, out h);
+        SDL_GetWindowSize(this.window, out var w, out var h);
         return (w, h);
     }
 
@@ -43,4 +41,4 @@ class Window
     {
         return this.window;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/system/EventPriority.cs b/Mine2d/engine/system/EventPriority.cs
index 200c9d9..8ca89ce 100644
--- a/Mine2d/engine/system/EventPriority.cs
+++ b/Mine2d/engine/system/EventPriority.cs
@@ -1,6 +1,6 @@
 namespace mine2d.engine.system;
 
-enum EventPriority
+public enum EventPriority
 {
     Lowest = 0,
     Low = 1,
@@ -8,4 +8,4 @@ enum EventPriority
     High = 3,
     Highest = 4,
     Important = 5,
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/system/annotations/Interactor.cs b/Mine2d/engine/system/annotations/Interactor.cs
index c790fea..acfda97 100644
--- a/Mine2d/engine/system/annotations/Interactor.cs
+++ b/Mine2d/engine/system/annotations/Interactor.cs
@@ -1,6 +1,6 @@
 namespace mine2d.engine.system.annotations;
 
-enum InteractorKind
+public enum InteractorKind
 {
     Client,
     Server,
@@ -8,17 +8,17 @@ enum InteractorKind
 }
 
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
-class Interactor : Attribute { }
+public class InteractorAttribute : Attribute { }
 
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
-class Interaction : Attribute
+public class InteractionAttribute : Attribute
 {
-    public string Type;
-    public InteractorKind Kind;
+    public string Type { get; set; }
+    public InteractorKind Kind { get; set; }
 
-    public Interaction(InteractorKind kind, string type)
+    public InteractionAttribute(InteractorKind kind, string type)
     {
         this.Type = type;
         this.Kind = kind;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/utils/Color.cs b/Mine2d/engine/utils/Color.cs
index bedd031..22a5e89 100644
--- a/Mine2d/engine/utils/Color.cs
+++ b/Mine2d/engine/utils/Color.cs
@@ -1,6 +1,6 @@
 namespace mine2d.engine.utils;
 
-class Color
+public class Color
 {
     public int R,
         G,
@@ -32,4 +32,4 @@ class Color
         color.a = (byte)this.A;
         return color;
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/engine/utils/Point.cs b/Mine2d/engine/utils/Point.cs
index ae36590..50c3261 100644
--- a/Mine2d/engine/utils/Point.cs
+++ b/Mine2d/engine/utils/Point.cs
@@ -1,9 +1,9 @@
 namespace mine2d.engine.utils;
 
-class Point
+public class Point
 {
     public static double Distance(double x1, double y1, double x2, double y2)
     {
         return Math.Sqrt(Math.Pow(x2 - x1, 2) + Math.Pow(y2 - y1, 2));
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/frontend/Frontend.cs b/Mine2d/frontend/Frontend.cs
index bb5298a..2d2b07e 100644
--- a/Mine2d/frontend/Frontend.cs
+++ b/Mine2d/frontend/Frontend.cs
@@ -1,11 +1,10 @@
 using mine2d.backend.data;
 using mine2d.core;
-using mine2d.core.data;
 using mine2d.frontend.renderer;
 
 namespace mine2d.frontend;
 
-class Frontend : IFrontend
+public class Frontend : IFrontend
 {
     public void Init()
     {
@@ -38,7 +37,7 @@ class Frontend : IFrontend
                     ctx.FrontendGameState.WindowHeight = e.window.data2;
                     Console.WriteLine($"Window resized to {e.window.data1}x{e.window.data2}");
                     var player = ctx.GameState.Players.Find(
-                        p => p.Guid == ctx.FrontendGameState.PlayerGuid
+                        p => p.Id == ctx.FrontendGameState.PlayerGuid
                     );
                     ctx.FrontendGameState.Camera.CenterOn(player.Position);
                 }
@@ -47,7 +46,7 @@ class Frontend : IFrontend
             {
                 var mousePos = new Vector2(e.motion.x, e.motion.y);
                 ctx.FrontendGameState.MousePosition = mousePos;
-                if (ctx.GameState.Players.Find(player => player.Guid == ctx.FrontendGameState.PlayerGuid)?.Mining != Vector2.Zero)
+                if (ctx.GameState.Players.Find(player => player.Id == ctx.FrontendGameState.PlayerGuid)?.Mining != Vector2.Zero)
                 {
                     var amp = ctx.FrontendGameState.MousePosition / ctx.FrontendGameState.Settings.GameScale + ctx.FrontendGameState.Camera.Position;
                     ctx.Backend.ProcessPacket(new BreakPacket(ctx.FrontendGameState.PlayerGuid, amp));
@@ -67,17 +66,10 @@ class Frontend : IFrontend
                 var movementInput = ctx.FrontendGameState.MovementInput;
                 if (e.key.keysym.scancode == SDL_Scancode.SDL_SCANCODE_F11)
                 {
-                    if (!ctx.FrontendGameState.Settings.Fullscreen)
-                    {
-                        _ = SDL_SetWindowFullscreen(
-                            ctx.Window.GetRaw(),
-                            (uint)SDL_WindowFlags.SDL_WINDOW_FULLSCREEN_DESKTOP
-                        );
-                    }
-                    else
-                    {
-                        _ = SDL_SetWindowFullscreen(ctx.Window.GetRaw(), 0);
-                    }
+                    _ = SDL_SetWindowFullscreen(
+                        ctx.Window.GetRaw(),
+                        ctx.FrontendGameState.Settings.Fullscreen ? 0 : (uint)SDL_WindowFlags.SDL_WINDOW_FULLSCREEN_DESKTOP
+                    );
                     ctx.FrontendGameState.Settings.Fullscreen = !ctx.FrontendGameState.Settings.Fullscreen;
                 }
                 if (e.key.keysym.scancode == SDL_Scancode.SDL_SCANCODE_A)
diff --git a/Mine2d/frontend/IFrontend.cs b/Mine2d/frontend/IFrontend.cs
index fca0a75..789748f 100644
--- a/Mine2d/frontend/IFrontend.cs
+++ b/Mine2d/frontend/IFrontend.cs
@@ -1,7 +1,7 @@
 namespace mine2d.frontend;
 
-interface IFrontend
+public interface IFrontend
 {
     public void Process();
     public void Init();
-}
\ No newline at end of file
+}
diff --git a/Mine2d/frontend/renderer/IRenderer.cs b/Mine2d/frontend/renderer/IRenderer.cs
index af1c3cb..ed3da4c 100644
--- a/Mine2d/frontend/renderer/IRenderer.cs
+++ b/Mine2d/frontend/renderer/IRenderer.cs
@@ -1,6 +1,6 @@
 namespace mine2d.frontend.renderer;
 
-interface IRenderer
+public interface IRenderer
 {
     public void Render();
-}
\ No newline at end of file
+}
diff --git a/Mine2d/frontend/renderer/WorldRenderer.cs b/Mine2d/frontend/renderer/WorldRenderer.cs
index 42990cc..49bec66 100644
--- a/Mine2d/frontend/renderer/WorldRenderer.cs
+++ b/Mine2d/frontend/renderer/WorldRenderer.cs
@@ -2,7 +2,7 @@ using mine2d.core;
 
 namespace mine2d.frontend.renderer;
 
-class WorldRenderer : IRenderer
+public class WorldRenderer : IRenderer
 {
     public void Render()
     {
@@ -29,4 +29,4 @@ class WorldRenderer : IRenderer
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/network/Converter.cs b/Mine2d/network/Converter.cs
index b14a42f..2a201de 100644
--- a/Mine2d/network/Converter.cs
+++ b/Mine2d/network/Converter.cs
@@ -1,11 +1,12 @@
 using System.Text;
 using mine2d.backend.data;
+using Mine2d.network;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 
 namespace mine2d.network;
 
-class Converter
+public class Converter
 {
     public static ValueType ParsePacket(byte[] bytes)
     {
@@ -19,7 +20,7 @@ class Converter
         var type = parsedRaw.GetValue("type");
         if (type == null)
         {
-            throw new Exception("Packet has no type");
+            throw new PacketException("Packet has no type");
         }
         var packetType = type.Value<string>();
         Console.WriteLine("Packet type: " + packetType);
@@ -27,7 +28,7 @@ class Converter
         {
             "move" => parsedRaw.ToObject<MovePacket>(),
             "connect" => parsedRaw.ToObject<ConnectPacket>(),
-            _ => throw new Exception("Unknown packet type")
+            _ => throw new PacketException("Unknown packet type")
         };
     }
 
@@ -36,4 +37,4 @@ class Converter
         var jsonString = JsonConvert.SerializeObject(packet);
         return Encoding.UTF8.GetBytes(jsonString);
     }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/network/PacketException.cs b/Mine2d/network/PacketException.cs
new file mode 100644
index 0000000..938cf99
--- /dev/null
+++ b/Mine2d/network/PacketException.cs
@@ -0,0 +1,8 @@
+namespace Mine2d.network;
+
+public class PacketException : Exception
+{
+    public PacketException(string message) : base(message)
+    {
+    }
+}
diff --git a/Mine2d/state/GameState.cs b/Mine2d/state/GameState.cs
index a00dedd..d7e0a9a 100644
--- a/Mine2d/state/GameState.cs
+++ b/Mine2d/state/GameState.cs
@@ -3,29 +3,29 @@ using mine2d.core.data;
 
 namespace mine2d.state;
 
-class FrontendGameState
+public class FrontendGameState
 {
-    public Vector2 MovementInput;
-    public Vector2 CameraPosition;
-    public int WindowWidth;
-    public int WindowHeight;
-    public Guid PlayerGuid;
-    public Camera Camera = new Camera();
-    public Vector2 MousePosition;
+    public Vector2 MovementInput { get; set; }
+    public Vector2 CameraPosition { get; set; }
+    public int WindowWidth { get; set; }
+    public int WindowHeight { get; set; }
+    public Guid PlayerGuid { get; set; }
+    public Camera Camera { get; set; } = new();
+    public Vector2 MousePosition { get; set; }
     public Settings Settings { get; set; } = new Settings();
     public string PlayerName { get; set; } = "Player";
 }
 
-class Settings
+public class Settings
 {
-    public int GameScale = 4;
-    public int UiScale = 4;
-    public bool ShowCollision = true;
-    public bool Fullscreen = false;
+    public int GameScale { get; set; } = 4;
+    public int UiScale { get; set; } = 4;
+    public bool ShowCollision { get; set; } = true;
+    public bool Fullscreen { get; set; } = false;
 }
 
-class GameState
+public class GameState
 {
     public List<Player> Players { get; set; } = new List<Player>();
     public World World { get; set; }
-}
\ No newline at end of file
+}
diff --git a/Mine2d/state/Player.cs b/Mine2d/state/Player.cs
index 0292ce6..7a3cb81 100644
--- a/Mine2d/state/Player.cs
+++ b/Mine2d/state/Player.cs
@@ -2,17 +2,17 @@ using mine2d.engine;
 
 namespace mine2d.state;
 
-class Player
+public class Player
 {
-    public string Name;
-    public Vector2 Position;
-    public Vector2 Movement;
-    public Guid Guid;
-    public Vector2 Mining;
-    public int MiningCooldown;
+    public string Name { get; set; }
+    public Vector2 Position { get; set; }
+    public Vector2 Movement { get; set; }
+    public Guid Id { get; set; }
+    public Vector2 Mining { get; set; }
+    public int MiningCooldown { get; set; }
 
     public Line GetBottomCollisionLine()
     {
         return new Line(this.Position, this.Position + new Vector2(16, 0));
     }
-}
\ No newline at end of file
+}