Nice idea, with good realization. I would add more feedback on the buttons though, sometimes I didn't know if I had clicked them or not. Also, I got 3000 points by just clicking "Fast" at the beginning and waiting :D
I agree the buttons should probably be visibly pressed and maybe make a sound when you do so. Yeah just going fast and staying close is kinda strong, but luckily not the optimal strategy to get the highest scores :D
