React is an original game though it has resemblance with Tetris. In this game you have to arrange blocks which fall from top of the screen into groups and make them react with key blocks. To create reactions, and large chain reactions. You have to break the down into water blocks. That can be cleared by draining them off the bottom of the screen. Water blocks gradually push down other blocks preventing you from blocking. The more water blocks you have in your column, the swifter the columns will push down. The arrow keys are the controls in this game.