價格：免費
檔案大小：39.2 MB
版本需求：系統需求：iOS 7.0 或以後版本。相容裝置：iPhone、iPad、iPod touch。
支援語言：英語
Can you keep the ball on the shelf? No problem. It's a piece of cake. Well, not really. Give it a try and you will soon find out.
Tilt your device side to side and see how long you can keep the ball on the shelf. Just don't loose your cool!
支援平台：iPhone, iPad