Really good!
I am by no means an expert at criticizing animation, nor do I claim to know any thing about animation...that is what I want to say first. Second, would be that I am not trying to be mean, nor offer destructive criticism. Just want to see you improve is all.
Alright, my main 'gripe' if it could be called that, would be, as LordofTrennaria said, I wish it was more fluid. I agree that it would have been epic as all hell if it were more fluid. Second, would be probably a POV thing, it might be the charm of your animations for the camera to follow closely in the action I don't know yet, I will probably after I write this but for now, I don't, however, I would have liked to not have gotten motion sick while watching this flash.
That's all I have to say, I hope you do more, despite what I said I did enjoy watching this, and I hope you improve (not bashing your style now btw). Later! ^^