It's alright, interesting idea.
Godd stuff, creative. The song seemed a little bunched up though. A great way to present multiple songs but I think it was too simple. Each tune or level theme could have used something more to signify the song's variation between each tune. In other words, I pretty much agree with kretan. If you told me nothing about this track and just had me listen to it, I would have thought it was just one song with too many change ups. For an up side, your level ideas are pretty good, very original. I could picture what you were going for. The more basic things about your song are good. (beat and so on.) Keep the music going. 7/10 3/5.