iPhone平台上的应用程序，一个火球在屏幕上滚动的Demo，学习如何知道动画及游戏-iPhone platform applications, a fireball on the screen rolling Demo, learn how to know the animation and games

iphone的滚弹珠程序(加速计),弹珠会随着iphone的倾斜来回的滚动-iphone marbles rolling program (accelerometer), marbles will tilt back and forth with the rolling iphone