feat: added LaunchRamp story

packages/pinball_components/sandbox/lib/stories/launch_ramp/launch_ramp_game.dart

@@ -0,0 +1,37 @@
+import 'dart:async';
+
+import 'package:flame/input.dart';
+import 'package:flutter/material.dart';
+import 'package:pinball_components/pinball_components.dart';
+import 'package:sandbox/common/common.dart';
+import 'package:sandbox/stories/ball/basic_ball_game.dart';
+
+class LaunchRampGame extends BasicBallGame with Traceable {
+  LaunchRampGame()
+      : super(
+          color: Colors.blue,
+          ballPriority: LaunchRamp.ballPriorityInsideRamp,
+          ballLayer: Layer.launcher,
+        );
+
+  static const info = '''
+    Shows how LaunchRamp are rendered.
+
+    - Activate the "trace" parameter to overlay the body.
+    - Tap anywhere on the screen to spawn a ball into the game.
+''';
+
+  @override
+  Future<void> onLoad() async {
+    await super.onLoad();
+
+    camera
+      ..followVector2(Vector2(0, 0))
+      ..zoom = 7.5;
+
+    final launchRamp = LaunchRamp();
+    unawaited(addFromBlueprint(launchRamp));
+
+    await traceAllBodies();
+  }
+}

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

@@ -0,0 +1,15 @@
+import 'package:dashbook/dashbook.dart';
+import 'package:flame/game.dart';
+import 'package:sandbox/common/common.dart';
+import 'package:sandbox/stories/launch_ramp/launch_ramp_game.dart';
+
+void addLaunchRampStories(Dashbook dashbook) {
+  dashbook.storiesOf('LaunchRamp').add(
+        'Basic',
+        (context) => GameWidget(
+          game: LaunchRampGame()..trace = context.boolProperty('Trace', true),
+        ),
+        codeLink: buildSourceLink('launch_ramp/basic.dart'),
+        info: LaunchRampGame.info,
+      );
+}