There are three circles at the top of the screen. When one is filled you press that button. ex: middle circle filled, press the B button asap, left and right circle filled, press the A and C button asap, continue until next round. It gets fast.
There's three buttons at the top of the screen. O O O When one is filled in, say, * O O you press A. if the middle one is filled in, O * O press B, and if * O * is filled in- the sides- you press A and C at the same time, and if this one is filled in OO* then ya press C. It's that easy. But if you press like, the middle one for instance, and the middle button is filled in again, you press it again. And you do the same with the others. But when you get higher and higher in levels, your game gets faster and faster. I hope I helped- this is everything I know about the game.