Could be better.
I will congratulate you for it being your first flash, but there were a few things that if fixed could make the animation better:
1- Do not, ever, under any conditions, get an .avi to .swf. It just looks terribly awful.
2- Shorten the character presentation, or just show the one's that are going to take part in the flash.
3- Use different camera angles, and improve the movement illusion. The sprites look a bit choppy.
It was very good for a first flash, though! The main problem was the conversion from .avi to .swf