TOO MANY GRADIENTS
It's also not hard to do 3D at all, especially when you tween. The characers did not look 3d, as well, just a bunch of gradiented sprites. The blood was done horribly, might I add.
You know what I didn't like, now redo it. This is constructive criticism, because I'm telling you what's wrong, so don't get all "OGM mean pearson!"