diff --git a/Shared/Scene.cs b/Shared/Scene.cs
index 02457ec..c6056a6 100644
--- a/Shared/Scene.cs
+++ b/Shared/Scene.cs
@@ -7,20 +7,20 @@ namespace SemiColinGames {
   public sealed class Scene : IScene {
     const float DESIRED_ASPECT_RATIO = 1920.0f / 1080.0f;
 
-    Color backgroundColor = Color.CornflowerBlue;
+    private readonly Color backgroundColor = Color.CornflowerBlue;
 
-    readonly GraphicsDevice graphics;
-    readonly Camera camera;
+    private readonly GraphicsDevice graphics;
+    private readonly Camera camera;
 
-    readonly RenderTarget2D sceneTarget;
-    readonly BasicEffect basicEffect;
-    readonly SpriteBatch spriteBatch;
-    readonly SoundEffectInstance music;
+    private readonly RenderTarget2D sceneTarget;
+    private readonly BasicEffect basicEffect;
+    private readonly SpriteBatch spriteBatch;
+    private readonly SoundEffectInstance music;
 
     // Draw() needs to be called without IsRunningSlowly this many times before we actually
     // attempt to draw the scene. This is a workaround for the fact that otherwise the first few
     // frames can be really slow to draw.
-    int framesToSuppress = 2;
+    private int framesToSuppress = 2;
 
     public Scene(GraphicsDevice graphics, Camera camera) {
       this.graphics = graphics;