If you are player 1 then press "A" for the left bumper to go up and "Z" for it to go down. If you are player 2 then press the up arrow key for the right bumper to go up and the down arrow key for it to go down. It is a two player game so play your friends and best if all have fun!!! If there are any faults or problems please tell me about them and how you think I should fix it.