A little too inspired by Ninja Scroll
I guess my enjoyment of this Flash was quite crippled by the blatant overlap with Ninja Scroll. I'm fairly certain that your characters and most of their poses are traced stills from the movie.. I mean, thats fine and all, but at least state your inspiration somewhere.
I enjoyed your use of sound effects taken from the Rainbow Six game series. Its a lot better than the "Uuuugh!" voice overs most people do themselves. lol
Anyway, the only reason you're getting anything above a 1 is because, copied or not, you did a great job putting this thing together. Needs a little more in the music department to set the mood. Otherwise, nice work. I hope you eventually develop your own style.