Very good, but room for improvement.
I can easily tell you put a lot of effort into this.
The animation was very high quality, but the image/video quality wasn't very good. The music (Even though not my taste) suited it very well. The animation was a good length. (Not too long, but not too short)
The thing is, though, this is slightly more suited to Youtube, as it is video. You don't have to use flash compression then. If you plan on putting these things on Newgrounds, you should at least try and learn to use flash.
It is much higher quality, it lets you use a preloader without any hassles and you don't get poor video quality. It may take some time, but it will be worth the effort, I can easily see you on the front page.
One again, great job, but take what I have suggested into consideration. Overall, I give it an 8/10 and a 4/5.