test: ignore start end for debug pinball

lib/game/pinball_game.dart

@@ -224,6 +224,7 @@ class DebugPinballGame extends PinballGame with FPSCounter, PanDetector {
     firstChild<ZCanvasComponent>()?.add(ball);
   }
 }
+// coverage:ignore-end
 
 // coverage:ignore-start
 class _PreviewLine extends PositionComponent with HasGameRef<DebugPinballGame> {
@@ -245,6 +246,7 @@ class _PreviewLine extends PositionComponent with HasGameRef<DebugPinballGame> {
     }
   }
 }
+// coverage:ignore-end
 
 // TODO(wolfenrain): investigate this CI failure.
 // coverage:ignore-start

test/game/pinball_game_test.dart

@@ -438,8 +438,9 @@ void main() {
   });
 
   group('DebugPinballGame', () {
+    final debugAssets = [Assets.images.ball.flameEffect.keyName, ...assets];
     final debugModeFlameTester = FlameTester(
-      () => DebugPinballTestGame(assets: assets),
+      () => DebugPinballTestGame(assets: debugAssets),
     );
 
     debugModeFlameTester.test(