A very unique concept, but I think the implementation wasn't very good. The tutorial is kinda misleading, at first i thought that you should press E repeatedly to shake the tree. Also I didn't understand at all what the snowman did, only when I've played a real level. Even after that, the snowman is very glitchy and the level design is not very good. Also, at the end of the level there is a 3 star ranking; but I'm still not sure at all what are the goals to get all stars. Maybe you could clarify it a little?
I believe you guys have spent too much time making the level editor :P
My suggestion would be to remove the tutorial alltogether, and use the first level of the game to teach the player how to do it.
Despite all of that, the art is ok, and the music is fun. I've missed some sound effects too.
Good job!