fix: tests from merge

test/game/components/flipper_test.dart

@@ -12,7 +12,7 @@ import '../../helpers/helpers.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
-  final flameTester = FlameTester(PinballGame.new);
+  final flameTester = FlameTester(PinballGameX.initial);
   group(
     'Flipper',
     () {

test/game/components/pathway_test.dart

@@ -6,9 +6,11 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:pinball/game/game.dart';
 
+import '../../helpers/helpers.dart';
+
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
-  final flameTester = FlameTester(PinballGame.new);
+  final flameTester = FlameTester(PinballGameX.initial);
 
   group('Pathway', () {
     const width = 50.0;

test/game/pinball_game_test.dart

@@ -5,10 +5,12 @@ import 'package:flame_test/flame_test.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:pinball/game/game.dart';
 
+import '../helpers/helpers.dart';
+
 void main() {
   group('PinballGame', () {
     TestWidgetsFlutterBinding.ensureInitialized();
-    final flameTester = FlameTester(PinballGame.new);
+    final flameTester = FlameTester(PinballGameX.initial);
 
     // TODO(alestiago): test if [PinballGame] registers
     // [BallScorePointsCallback] once the following issue is resolved: