The object of Tetris is, of course, to make horizontal lines from the falling shapes. The controls are entirely based around touchscreen gestures. You tap to the side of a falling block to rotate it one way or the other, click and drag a shape to place it, or tap the bottom of the screen to make it fall instantly. There is a d-pad mode in the game, if you're having trouble with the gesture-based controls. There is just one mode in this free version of Tetris for Android, Marathon mode. This much like the traditional Tetris, where you just keep going, the levels raising and the bricks falling faster as you go. Upgrade to the full version and you'll also get Magic mode. Here, you get to use cool power-ups to help you beat each level, such as exploding mines that destroy blocks; bubble wrap that lets you pop individual square; and a magic crayon that lets you draw any shaped brick you like.