Good
The one thing that bother me is that you know that the loading time is long, but still put music in the loader, perfectly stopping ppl from watching something else while this loads.
Other than that, great flash! The music and silly battle at first was ok. Then it gradually gets more serious, and even has a 3d bowser. I still think the falling part had a lot more potential, but I liked the music in that part. Also, man, the end of the fight was brutal... You could've had 'em battle a little more after the fall.
Still, the ending was good, and surprisingly the credits were fun to watch!
Oh, and the paramite part was fun, and those Oddworld-themed animations really show your skills, in other departments than sprites.
What's up now then? Would be so awesome if you made an animation based on Oddworld, but it's up to you...