Awesomeness, just EPIC
Now that I have wasted my adjectivs for this review, here it is some constructive critisism:
-The music, well, could be better. Im not saying that Fatboy suxx hard, etc etc, its just that it doesnt fell right. You could have chose something that related more to the animation.
-The ending, like you say, its a bit rushed, but you could work on a sequel or a reedition to redeem yourself :P
The stuff that I point out is normal due to the fact that it was for an assingnment, so you can improve that for the next time.
Keep it up ;)