Well, i can see that you've put an admirable amount of effort into this clip.
The storyline is nice, just about the same thing has been done before but what the heck....
To the criticism:
The voices are kind of gay, though nicely recorded. I guess this is as good it CAN get in a homemade animated vid. The sounds could've been better, but they're ok.
The artwork looks amateuristic, especially the faces of the combatants. Some of the animations are fairly good, but it still has an overall stiffness to it.
Hopefully your artwork will improve as you make more and more movies, one day you will make Rurouni Kenshin stuff, i promise ;)
Keep it up