Use keys q and a for player two and o and l for player one. Player One is green and Player Two is blue.
PLEASE READ! If you do happen to play this game and move your panel to either the very top or very bottom of the screen, you will notice that the panel SLANTS. This is something that really annoys me, and it might annoy you too. So if it does, try to avoid it. I've tried to fix it but it keeps on happening. It really ruins the game!! vank72