It was a good, little experience!
It sounds a little like Meat Boy, while it's not as frustrating as that game.
Controls were good for the most part (didn't really like the icy platforms to be honest... you start moving like you're on a crazy conveyor belt!).
Graphic is nice (really liked the little background effects) and the music is pretty catchy!
Last, I really enjoyed the ball trasformation!
With 100 deaths, all 13 coints, I collapsed the window satisfied!
Not the most original game on earth, still a nice, small platformer!