Filed under: iPhone , App Store , iPod touch Coolness Test (iTunes link) is a well-executed game of skill where you tap a green button as it moves around the screen. You have to avoid the red button, and both move around the screen with each tap. The developers found people were playing for extraordinary lengths of time, and I can see why. You can enter a sort of trance as you focus on the movement of the buttons. It might even improve hand/eye coordination, but all videogames say that, don’t th