ePress right and left arrow of your com, or pc to make the Paddle move left to right (Blue line). D increases the ball speed and A decreases the ball speed. If you want to play again, make sure you press the red button next to the Green Flag and then press the space button on your com, or pc and then press the green flag.
Thanks to Soccer (BURGERKING117828546) For showing me how to do this. The score goes up every time the ball hits the Paddle (Blue line). (My high score 4707.5 speed -3)