Space for a new petal. A for a new size in your chosen category (big/small). C to clear. MULTI-COLOURED SECRET! PRESS 'M'! BEST USED WITH A SIZE OF 40! HALF IS PRETTIEST, FULL IS JUST AWESOME!
USE TURBO MODE! SHIFT + GREEN FLAG! If you have a nice size of petals, but the petals overlapped, just press C to clear then try again. That way you won't get a new size. I'm still working on this project.