Spend more time working on it
The animation was low quality and there was no background, but had a nice music going on. And all the actions were too fast to fully apreciate (I had to watch twice to see all the plot). Put more frames between the scenes to make then smoother.
I know this is just a flash to improve your drawing skills, but I think it would be better if you just improve then BEFORE submitting some real thing. You would have better movies to show and probably more popularity. Or you can just continue with your way since most of your flashes ends on the top 5 of the day. Still, I'd rather see better things coming from you.
Anyway, good job and good luck training with frame by frame.