Hehe, thanks for giving this a real shot!
I was really aiming for a "get-in-the-groove" feel once you got higher up. It sounds you like felt some of that, so that's great to hear.
Thanks for the kind words on sound design. I spent more time on it than I'd like to admit :P It always surprises me how sounds (like wind when going farther up) can make a big different to a game's feel.