This free game brings a fun and addictive rhythm game to the iPhone and iPod Touch. In the style of Dance Dance Revolution and Guitar Hero, the objective is to tap on the beats as they come down the screen.
The game was actually based on Tap Tap Revolution, a game that had been available for Jailbroken iPhones. The new developers have since added accelerometer support with left, right, and forward movements as well as two-player support.
The initial version only comes with 4 songs, but offers the ability to download more tracks. No extra songs are presently available but Tapulous is promising new tracks will come soon in addition to a stability update.
This YouTube video provides a good overview of the game: