at the beginning it is not ball physics it is just sort of an intro but after it it is ball physics if you wait for a while you can get a lovely pattern(by while I mean until it fills the whole screen in lovely lines of color there might be a little white spots but that does not matter) and after the intro you must wait 2 seconds for it to start the ball physics animations. hope you have fun.
All me use regular mode then turbo mode if you don't know how to use turbo mode click shift and press the green flag at the same time