Pretty nice animation overall. There are some parts that could use a little work (for example, what I can only describe as the "kicking part" in which the guy just completely disappears in one frame, he should probably move off of the screen with the kick, not disappear).
When the one character speaks, his mouth is lined in black. This looks totally out of place, considering the fact that the rest of him is drawn in orange.
As I said, nice animation. I hope you get the 3 stars you were shooting for!