Move your hand to hit the tennis ball. Every time you hit the ball it will clone and you get a point. If you have too many clones, the score will stop increasing and so will the cloning. You have 60 seconds to get as many clones as possible, then you have 10 seconds to clear the clones by pressing the up key. Again, I cannot detect your username, but I like to use the block for effect. Play with the level to adjust the sensitivity.
I would like to thank Cloud50 for inspiring this idea, and helping with the background. Please like and comment below. If you comment, I will reply to you with the cheat code!