refactor: renamed FlipperGame

packages/pinball_components/sandbox/lib/stories/flipper/flipper_game.dart

@@ -6,12 +6,19 @@ import 'package:sandbox/common/common.dart';
 
 import 'package:sandbox/stories/ball/basic_ball_game.dart';
 
-class BasicFlipperGame extends BasicBallGame with KeyboardEvents {
-  BasicFlipperGame({
+class FlipperGame extends BasicBallGame with KeyboardEvents {
+  FlipperGame({
     required this.trace,
   }) : super(color: Colors.blue);
 
-  static const info = 'Shows how a Flipper works.';
+  static const info = '''
+    Shows how Flippers are rendered.
+
+    - Activate the "trace" parameter to overlay the body.
+    - Tap anywhere on the screen to spawn a ball into the game.
+    - Press left arrow key or "A" to move the left flipper.
+    - Press right arrow key or "D" to move the right flipper.
+  ''';
 
   static const _leftFlipperKeys = [
     LogicalKeyboardKey.arrowLeft,

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

@@ -1,17 +1,17 @@
 import 'package:dashbook/dashbook.dart';
 import 'package:flame/game.dart';
 import 'package:sandbox/common/common.dart';
-import 'package:sandbox/stories/flipper/basic_flipper_game.dart';
+import 'package:sandbox/stories/flipper/flipper_game.dart';
 
 void addFlipperStories(Dashbook dashbook) {
   dashbook.storiesOf('Flipper').add(
         'Basic',
         (context) => GameWidget(
-          game: BasicFlipperGame(
+          game: FlipperGame(
             trace: context.boolProperty('Trace', true),
           ),
         ),
         codeLink: buildSourceLink('flipper/basic.dart'),
-        info: BasicFlipperGame.info,
+        info: FlipperGame.info,
       );
 }