refactor: removed unused assets at test and renamed spriteAsset for ball

lib/game/components/controlled_ball.dart

@@ -16,7 +16,7 @@ class ControlledBall extends Ball with Controls<BallController> {
   /// A [Ball] that launches from the [Plunger].
   ControlledBall.launch({
     required CharacterTheme characterTheme,
-  }) : super(spriteAsset: characterTheme.ball.keyName) {
+  }) : super(assetPath: characterTheme.ball.keyName) {
     controller = BallController(this);
     layer = Layer.launcher;
     zIndex = ZIndexes.ballOnLaunchRamp;
@@ -27,7 +27,7 @@ class ControlledBall extends Ball with Controls<BallController> {
   /// {@endtemplate}
   ControlledBall.bonus({
     required CharacterTheme characterTheme,
-  }) : super(spriteAsset: characterTheme.ball.keyName) {
+  }) : super(assetPath: characterTheme.ball.keyName) {
     controller = BallController(this);
     zIndex = ZIndexes.ballOnBoard;
   }

packages/pinball_components/lib/src/components/ball/ball.dart

@@ -15,11 +15,11 @@ export 'behaviors/behaviors.dart';
 class Ball extends BodyComponent with Layered, InitialPosition, ZIndex {
   /// {@macro ball}
   Ball({
-    String? spriteAsset,
+    String? assetPath,
   }) : super(
           renderBody: false,
           children: [
-            _BallSpriteComponent(spriteAsset: spriteAsset),
+            _BallSpriteComponent(spriteAsset: assetPath),
             BallScalingBehavior(),
             BallGravitatingBehavior(),
           ],

packages/pinball_components/sandbox/lib/stories/ball/basic_ball_game.dart

@@ -40,7 +40,7 @@ class BallGame extends AssetsGame with TapDetector, Traceable {
   void onTapUp(TapUpInfo info) {
     add(
       Ball(
-        spriteAsset: characterBallPaths[character],
+        assetPath: characterBallPaths[character],
       )
         ..initialPosition = info.eventPosition.game
         ..layer = ballLayer

packages/pinball_components/sandbox/lib/stories/plunger/plunger_game.dart

@@ -6,8 +6,6 @@ import 'package:sandbox/common/common.dart';
 import 'package:sandbox/stories/ball/basic_ball_game.dart';
 
 class PlungerGame extends BallGame with KeyboardEvents, Traceable {
-  PlungerGame() : super();
-
   static const description = '''
     Shows how Plunger is rendered.
 

packages/pinball_components/test/src/components/ball/ball_test.dart

@@ -11,7 +11,6 @@ import '../../../helpers/helpers.dart';
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
   final assets = [
-    Assets.images.ball.flameEffect.keyName,
     theme.Assets.images.android.ball.keyName,
     theme.Assets.images.dash.ball.keyName,
     theme.Assets.images.dino.ball.keyName,

test/game/components/controlled_ball_test.dart

@@ -34,7 +34,6 @@ void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
   final assets = [
     theme.Assets.images.dash.ball.keyName,
-    Assets.images.ball.flameEffect.keyName,
   ];
 
   group('BallController', () {

test/game/components/flutter_forest/behaviors/flutter_forest_bonus_behavior_test.dart

@@ -24,7 +24,6 @@ void main() {
     final assets = [
       Assets.images.dash.animatronic.keyName,
       theme.Assets.images.dash.ball.keyName,
-      theme.Assets.images.dash.ball.keyName,
     ];
 
     setUp(() {