refactor: dinowalls sandbox refactor

packages/pinball_components/sandbox/lib/stories/dino_wall/dino_wall_game.dart

@@ -5,10 +5,10 @@ import 'package:pinball_components/pinball_components.dart';
 import 'package:pinball_flame/pinball_flame.dart';
 import 'package:sandbox/stories/ball/basic_ball_game.dart';
 
-class DinoWallGame extends BasicBallGame {
+class DinoWallGame extends BallGame {
   DinoWallGame() : super();
 
-  static const info = '''
+  static const description = '''
     Shows how DinoWalls are rendered.
 
     - Activate the "trace" parameter to overlay the body.

packages/pinball_components/sandbox/lib/stories/dino_wall/stories.dart

@@ -1,15 +1,11 @@
 import 'package:dashbook/dashbook.dart';
-import 'package:flame/game.dart';
 import 'package:sandbox/common/common.dart';
 import 'package:sandbox/stories/dino_wall/dino_wall_game.dart';
 
 void addDinoWallStories(Dashbook dashbook) {
-  dashbook.storiesOf('DinoWall').add(
+  dashbook.storiesOf('DinoWall').addGame(
-        'Basic',
+        title: 'Traced',
-        (context) => GameWidget(
+        description: DinoWallGame.description,
-          game: DinoWallGame()..trace = context.boolProperty('Trace', true),
+        gameBuilder: (_) => DinoWallGame(),
-        ),
-        codeLink: buildSourceLink('dino_wall/basic.dart'),
-        info: DinoWallGame.info,
       );
 }