I'm sure we all know how to play tetris, however I will note the rules here :) The goal of the game is to complete a layer with blocks without gap which will cause the layer to disappear. With ongoing time this will become more and more difficult as the speed with which the blocks fall will increase. Use LEFT and RIGHT ARROW KEYS to rotate tiles, hit UP ARROW KEY to rotate tile and press DOWN ARROW KEY to drop the tile down. Good luck!