If you like iShakeit, then you'll enjoy playing the iPhone game, TapStar, which causes you to follow commanding sounds and do what you are asked by Tapping, Sliding, Shaking and Holding it. When you are asked to Shake It, be sure to shake it real good or you will end up losing the game. When
You can play the game with friends or alone. The app is $1.99 in the App Store.

via: TapStar app for the iPhone tests your reflexes in a very different way » iPhonestalk.com

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