diff --git a/Program.cs b/Program.cs
index e745111..cf88953 100644
--- a/Program.cs
+++ b/Program.cs
@@ -16,8 +16,8 @@ public class CameraInfo {
     Resolution = resolution;
   }
 
-  public static readonly CameraInfo NIKON_D7000 = new CameraInfo(new Vector2i(4928, 3264));
-  public static readonly CameraInfo IPHONE_12_MINI = new CameraInfo(new Vector2i(4032, 3024));
+  public static readonly CameraInfo NIKON_D7000 = new(new Vector2i(4928, 3264));
+  public static readonly CameraInfo IPHONE_12_MINI = new(new Vector2i(4032, 3024));
 }
 
 public class Shader : IDisposable {
@@ -186,7 +186,7 @@ public class Texture : IDisposable {
 }
 
 public class UiGeometry {
-  public static Vector2i MIN_WINDOW_SIZE = new Vector2i(640, 480);
+  public static Vector2i MIN_WINDOW_SIZE = new(640, 480);
   private static CameraInfo activeCamera = CameraInfo.NIKON_D7000;
 
   public readonly Vector2i WindowSize;
@@ -206,7 +206,7 @@ public class UiGeometry {
       ThumbnailBoxes.Add(box);
     }
 
-    PhotoBox = new(0, 0, WindowSize.X - thumbnailWidth, WindowSize.Y);
+    PhotoBox = new Box2i(0, 0, WindowSize.X - thumbnailWidth, WindowSize.Y);
   }
 }
 
@@ -219,7 +219,7 @@ public static class Util {
 public class Game : GameWindow {
   public Game(GameWindowSettings gwSettings, NativeWindowSettings nwSettings) : base(gwSettings, nwSettings) {}
 
-  private static Texture TEXTURE_WHITE = new Texture(new Image<Rgba32>(1, 1, new Rgba32(255, 255, 255)));
+  private static Texture TEXTURE_WHITE = new(new Image<Rgba32>(1, 1, new Rgba32(255, 255, 255)));
 
   UiGeometry geometry = new();
 
@@ -237,7 +237,7 @@ public class Game : GameWindow {
   int VertexArrayObject;
   List<Texture> textures = new();
   int textureIndex = 0;
-  Shader shader = new Shader();
+  Shader shader = new();
   Matrix4 projection;
 
   protected override void OnUpdateFrame(FrameEventArgs e) {
@@ -435,7 +435,7 @@ static class Program {
     nwSettings.Title = "Totte";
     // FIXME: nwSettings.Icon = ...
 
-    using (Game game = new Game(gwSettings, nwSettings)) {
+    using (Game game = new(gwSettings, nwSettings)) {
       game.Run();
     }
   }