Wow.... totally unique.
I've never seen anything like this. My only complaint it that there should have been more environments, or more to interact with in each environment .... I would've played this for much, much longer if so.
The blending of visual and auditory interactions was very well done, and rewarding (It just made me feel good). I'd like to see another, much larger one of these... --By the way, what would you call this type of work?--.
Very creative and interesting, excellent work.