Press the flag to begin. If you're playing on red, use keys W and S to move your paddle. If you're playing on blue, use the UP and DOWN ARROWS to move your paddle. If you're a daredevil and you're playing on BOTH... use both sets of keys to move, and may the best man, woman, child, or unidentified object win!
Note: Don't worry if the ball goes out of the court. I'll fix it later.