feat(#8): improve debug

modules/game-objects/index.js

@@ -1,6 +1,6 @@
 export { Camera } from "./camera.js";
 export { CanvasResizer } from "./canvas-resizer.js";
-export { Debug } from "./debug.js";
+export { FpsCounter } from "./fps-counter.js";
 export { GameObject } from "./game-object.js";
 export { MapManagement } from "./map-management.js";
 export { Map } from "./map.js";