Not bad
I don't know if you know about this, but setting the audio for this animation to 'stream' in the properties panel will connect each frame with a part of the sound- th e reason why your synching is off is because it's set to event, which makes it run seperately.
You have some really nice drawings and frame-by-frame work (the 'FBF' as mentioned by another reviewer). I would enjoy seeing the whole song with an animation behind it, colored and everything, more finished looking.
Overall I think it is pretty good.