fix: camera position (#74)

* fix: camera position

* Update lib/game/pinball_game.dart

Co-authored-by: Allison Ryan <77211884+allisonryan0002@users.noreply.github.com>

Co-authored-by: Allison Ryan <77211884+allisonryan0002@users.noreply.github.com>

lib/game/pinball_game.dart

@@ -41,9 +41,9 @@ class PinballGame extends Forge2DGame
     unawaited(_addPaths());
     unawaited(addFromBlueprint(Spaceship()));
 
-    // Fix camera on the center of the board size
+    // Fix camera on the center of the board.
     camera
-      ..followVector2(screenToWorld(boardSize / 2))
+      ..followVector2(Vector2.zero())
       ..zoom = size.y / 14;
   }