Fair try here, but I think you should work a little on the animation quality and make the sprites less "shaky", which is quite usual problem at start though, try using "onion skin", which is really helpful sometimes.
I think this series has great amounts of potential...I think the reason you got such of a low score is because of it was not clean. When I mean clean I mean it didn't seem to have to finishing touches...the music was excellent though so keep pushing the envelope.
This was some quite well done stuff, the only reason I gave such a low score is it seemed like some rip off of a typical marshal arts anima, and I don't like those shows, still you could make a interesting series out of this
While you did put time into it.. it seems it was aimed to whoever happens to be a fan of some game. I'm not a fan, just a confused person wondering what's in there for me. I gave you 5 stars because it was a well done animation.
I wish it was longer but oh well. I always wanted someone to do a fight sequence to that song. Now I can say someone has. Great graphics. Try to work on pacing, allowing the action to flow better with the music. Good work overall.