Expressive is Impressive.
This is good, especially for a start! Great selection of music I will say that now. If you made videos like this longer, it would be even more impressive. Plus, I would say if I knew ANYTHING about flash I would help you with your music sync problem, but I don't know squat about flash. It seems interesting though for your "sync error" that the music continues to play after it goes back to the Play button, kind of sets the mood of what you just watched. But good luck dude, I coulden't say it any better!