Use the mouse to move the Paddle left and right and keep the little purple ball alive. To start, click the on the green flag 2x (Don't ask why) and it should start, just try to be attentive to the little purple ball. *small update* .Their is now a scoring whenever the purple ball hit's the paddle. .The "Restart" button does kinda work, but you just have to press it and the ball will go back to the start and then just click on the green flag again and it should all go great.
This took a while, but it was worth it. It may be a bit tough, but it's not to bad.