feat: rebase fixes

test/game/pinball_game_test.dart

@@ -12,7 +12,7 @@ void main() {
   group('PinballGame', () {
     TestWidgetsFlutterBinding.ensureInitialized();
     final flameTester = FlameTester(PinballGameTest.create);
-    final debugModeFlameTester = FlameTester(DebugPinballGameX.initial);
+    final debugModeFlameTester = FlameTester(DebugPinballGameTest.create);
 
     // TODO(alestiago): test if [PinballGame] registers
     // [BallScorePointsCallback] once the following issue is resolved:

test/helpers/extensions.dart

@@ -10,3 +10,13 @@ extension PinballGameTest on PinballGame {
         ),
       );
 }
+
+/// [DebugPinballGame] extension to reduce boilerplate in tests.
+extension DebugPinballGameTest on DebugPinballGame {
+  /// Create [PinballGame] with default [PinballTheme].
+  static DebugPinballGame create() => DebugPinballGame(
+        theme: const PinballTheme(
+          characterTheme: DashTheme(),
+        ),
+      );
+}