Loved the feeling I had when I wanted to speed up and cutted my finger. Well done!
I think the game could have increased it's difficulty more and the movement of the roll could need some tiny acceleration at the beginning (it seem to be a linear speed) to make easier to do tiny distances.
Really good job, I will remember this game.
EDIT: I come back from the game, I just did echap to quit the game. Brillant.