Wave your hand over the circles- one turns you, and one shoots in whichever direction you choose. The direction you move and shoot is determined by what side of the circle you activate. It's hard to get a hang of, but once you do, you'll have fun.
Me messing around again just for fun. I literally can't add a high score system. I tried, but it doesn't work because Scratch disallows cloud variables on this type of project for very valid reasons.