I might be getting warm...I got this from another location
Since the USB stick comes from the factory with two dualboot-aware applications pre-programmed, you can switch the ZSTAR demo board to work like a remote mouse easily by pressing the button on the USB stick. This information can be found in the ZSTAR Reference Manual (page 53):
http://www.freescale.com/files/sensors/doc/ref_manual/ZSTARRM.pdf
Movement of the cursor on screen is done very simply by tilting the sensor board in XY-axes. The two buttons on the Sensor board have the same functions as buttons on a real mouse.
Your game application is very interesting, I would recommend to try it. You can find more information on HID Class – Mouse in the AN3153 “Using the Full-Speed USB Module on MC68HC908JW32” on the web:
http://www.freescale.com/files/microcontrollers/doc/app_note/AN3153.pdf