Okay, it is a good game, but let me point out some stuff:
First, there's a bug where if you flip while holding the jump button, you lose (apparently random) momentum.
Second, the last level with the white moving block forces you to move along with it, like, you have to walk or you will fall off the block and you have to retry. I don't know if it was intended.
Third, even if you don't hold a button, you seem to slightly lose momentum over time. Intended?
Fourth, when you are moving right, and you then press left, you seem to slide a bit and then you change directions, but if you stop moving by not pressing anything, you come to an almost instant stop, without sliding.
Aside from that, it was a great game.
Minimalistic. :)