I saw this on youtube and can't wait for it to hit the app store. It looks like a very good remake of Falldown on the TI-83/83+/84/84+. That game killed lots of time in math class.
Power Rush is another free version of this type of game http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=315088648&mt=8