It is a nice idea but I think the execution could be better. Well, first thing's first, the music is really annoying(it is okay, I'm also not music master, my game has also really bad music). I guess the game would be better if the obstacles were random, right now the obstacles are really unfair because there is always only one path you can use it. The graphics are nice, no problem on this. Oh, and collisions on trees, I think it would be better to add some slippery there, so the player don't lose a lot of time turning.
Anyway, you did a nice job but try to polish a little bit and it would be a great game. Be sure to check mine!