这位大叔晚上喝多了，快扶他回家吧，否则他就要睡倒在马路上露宿街头了。
任务：利用重力感应控制主角方向，保持平衡，帮助他走回家
Here is a drunk man, please help to get him back home or otherwise he has to sleep on the street tonight.
Mission: By using the iPhone accelerometer to keep the balance so he can walk to his home.