This was done by getting coordinates from the MacBook’s sudden motion sensor and routing it into keyboard strokes (arrow keys), then sending it to an online game of Pacman.  

NEW: You can do this by downloading and running the new Tilt2Joystick application. This is a standalone application that will allow you to play games and control documents by tilting the Laptop.  It is available for free for compatible Macintosh laptops from this link. 

You can do this using Bookmotion and Max/MSP. Please note that you might need to have some experience with Max/MSP in order to get it running.  Once you have gotten your coordinates from Bookmotion, you can send them to keyboard strokes using aka.keyboard.   Use Tilt2Joystick!