Choose a number of players and a difficulty setting. Number of players: - 0: Computer vs. computer, just watch - 1: Single player, you are blue - 2: Multiplayer, player 1 is blue, player 2 is red Controls: - Blue player: w to move up, s to move down - Red player: up arrow to move up, down arrow to move down - Hitting the ball while in movement causes the ball to move quicker in the direction you were moving in Warning: Some graphical errors may happen: for example, the ball can seemingly pass through the paddle or bounce off of nothing. This is caused by a slight delay between the rendering of the paddles and the calculations for the ball movement. In any case, the movement of the ball is correct, and should dictate play accordingly.