Great composition!
This really saddens me--this song is written very nicely, though it's obvious you used MIDI inputs to write it. You should do yourself a favor and go find some free soundfonts on the internet to make your piece sound real. Your drums are really lacking volume and richness with this mix.
Again, your composition is wonderful, you just need to get some more realistic sounds. If you want, I'll put some great soundfonts to use with this and give it back to you for a re-submission, because I think this has great potential to be used in a flash submission--without a doubt.
My email's "snazzypadgett@gmail.com" if you're interested