It's alright :D
It was a decent attempt, and a good concept, but it didn't have good energy--it wasn't interesting, if you get what I'm saying.
For some constructive criticism, I'd say you should work on better-quality effects and such. For the most part, it seemed "scribbly." But, I am glad you liked my song and put it into a video--that's a first for me :D
Anyways, try taking some tutorials on effects for FMV5, check http://www.flashkit.com/ and http://www.flashperfection.com/ for some good tuts.
Good luck!