Well, that was a really neat concept!
I liked the design overall, I think it would be nicer if the beat thingies were togglable with a button, rather than walking over them, they are kinda hard to control in spots (which is fine but hey, I'm needy). I was worried about the ending but youknow, it worked out. I wonder if there were multiple paths at the end? I dunno.
The audio did seem to get out of sync maybe a little when everything was going but overall, I really like the sound choice and it all fit well.
Very cool game!