Not bad, but could be better.
This was pretty good, I thought the way all the little ninja people looked, and all the different fights were pretty creative, I especially liked the hiding-behind-the-corpse part, and you must have worked hard on this. You might want to put a little more detail into backgrounds, and maybe make your action a little bit faster-paced. It was cool, but there were a few times when everyone was moving a little slowly, and the black ninjas reacted very slowly at a few points. Maybe get some faster-paced music, too. But you've really got a great idea here, please make more! :P