Hm, ending wasn't so great.
~ Animation/Graphics ~
So how did this do in the contest or is the contest not over yet? I personally thought that the animation was great and I'm always impressed when people can make sprite animations fast paced and enjoyable like this. In my opinion it's animated with some of the best sprite animators I had ever seen. Backgrounds and everything else were great. Very good visually all around.
~ Story/Content ~
I would usually complain about there not being a story to why the two sides are fighting, but I don't know what the competition requirements were. I personally rather see a reason why they are fighting even if it's something small and stupid like why Peter and the big chicken fight on family guy.
The fight was pretty action packed and lasted a pretty good length. I wouldn't mind it being a tad bit longer, but you timed it pretty well. The ending wasn't very good in my opinion simply because I couldn't tell what happened. I wouldn't have known unless you wrote that they both punched each other in the face in a response to one of the reviews below.
I would have rather seen it end with them crashing through the ice and fighting underwater or something similar to that.
~ Audio ~
The sound effects were really good and I like that you used some voices here and there. The music was also pretty good, but don't shy away from using the audio in the audio portal here. There's some really good stuff.
~ Overall ~
It was a pretty good action packed submission. I wouldn't have minded a reason why or a better ending though.