Good Job.
I liked the concept, and it certainly made me smile.
A few pointers to help future projects of yours do better in the portal:
1~ Don't use so many sound files. No, sound effects are crucial to most movies success. Same with music. But you use too many music files. Take the credits, for example: no need for that music, and it didn't really fit with the rest of the movie's feel. Without that one single mortal kombat song, the movie would have been fine, and would have loaded faster, too.
2~ Don't use whole music files. Aside from taking up bandwidth, you end up bending your animation to fit the music. Just use the parts of songs you need.
3~ Speed it up. There are a more than a couple places where the movie hangs for a minute, where no real action is taking place. One or two seconds doesn't seem like much, but you've got to remember your audience. Newgrounders tire quickly of movies without deliberate pace.
4~ Stream. Don't make people wait for 4 megs to load. Give users with high-speed access the ability to play the movie before it's done loading.
5~ Optimize your flash. You're doing well, but you need to learn the art of making flash files smaller. Use sound loops instead of whole songs. Tweak the mp3 compression. Use symbols more. Use tweens less. Reduce the use of 'messy' art. Less lines, less corners and curves = faster and smaller. There are more tips and tricks, but these are the fundamentals.
Good luck.