Very classic use of the theme, but not in a bad way. The obstacles are, however, pretty brutal for a death knocking you back to the start of the game (especially since one of them is a spike you can hit by accidentally holding forward when beating the level)
I think if a death just knocked off some points and made you restart the level it'd be a lot more fun to play.
That being said, the game was still pretty fun. I found the physics really nice and smooth and the graphics were nicely stylized even if they weren't anything special. Good work!