I think the range where players can hear things should more or less match the range where they can see things. That way blind players (relying on audio) and deaf players (relying on visuals) can get roughly the same information. That's how I intended the game to work, but I ran out of time.
All three music sounds together? That's a nice idea, but the rhythms would have to match up, which they currently don't (the guitar track is in 9/4, and the recorder track is in 4/4... and the drum was meant to be a suond effect). I could change one of the tracks to fit the other, but I think if I make more levels, I can give each level three tracks that will play nice together. In fact, the guitar and recorder tracks were meant to represent different places the main character had lived in the past, and they're also inspired by music from different places where I've lived myself.
Thanks for the feedback!