A great concept, and the first few levels are quite fun. I also couldn't figure out exactly how to keep the ball balanced, on level 4 or maybe 5 (the one with a hump then bigger ramp at the start) I couldn't consistently get the ball back to balanced after the ramp, even accelerating from a full stop when it leant forwards. I really like the idea of one countdown encouraging you to play fast, and the other making you go slow and carefully.