Great, great game !
Graphics and style - simple, but they did fit the idea.
Sound - very nice, with a lot of different kinds of music, which was important.
The difficulty was intersting, as it really grew when you got to harder songs, and I think anyone could enjoy this game, not only those who are completely mad about these...Fun, though the pick of destiny was really really hard to get ^^
Keep up, I hope you'll get a prize for this in the Rock Out contest !