Piano Keys (4 in 1) is one of the best game to test your ability tapping your screen with speed and accuracy. All you have to do is always tap black tiles and DON'T TAP THE WHITE TILE! Or the red one. Pretty easy, huh?Features:Share your best score to your Facebook friends and Twitter followers.Prove that you are the best in the Leaderboard.Four-in-one game modes.Game modes:- Sprint: tap 100 tiles as fast as you can.- Endless: your endless tiles-tapping journey.- Rush: you got 10 seconds to tap as many tiles as you can.- Bomb: just don't tap the bomb.