"This one sort of just came out randomly. I was working on another track, and one of the ideas that I started vamping on was this riff. I held onto it and came back a year later to make it into a song. Towards the end of the song you'll hear some pulsing parts. I like to label those "Reich" in my song session (for Steve Reich)."
This song is just the notes being played. In the actual game, glowing blocks create a song more complete than this. You'd have to Youtube it, though.