use [ wasd or arrow keys ] to move the red paddle use [mouse pointer] to move the other player(green player).this game is not a multiplayer but its a 1v1 player game. you can play with your friends or siblings in one PC or whatever. if you or your opponent score till 20, you or they would win. if you see some commmets when after starting the b game, you just restart the game by clicking stop button and green flag .