Use the mouse. This is hard at first but really fun once you get the hang of it. NOTE: You get points when the balls touch the green area when they are yellow, NOT when they touch the paddle. Try turbo mode for an extra challenge! :)
This is similar to my game asteroid defense, and also pong I give credit to anyone who has made this game before me. I made a special edition 2P version that uses up, down, w and s