love the percussion!
the orchestra really adds to the dramatic effect. your music reminds me of Danny Elfman's stuff! I've gotta download this stuff! you're amazing!
suggestions:
The bass drum heartbeat phrase things at the beginning would be even better if they were ear-bleeding loud
once again, i love the low brass parts, but it might be even cooler if you added chords onto the brass rather than just with the background synths.
To add to the sci fi affect of the whole song, the motor background synth could pan a bit more, or even have a chorus effect on it. I just feel it could be a bit more fxed, u know?
Just gotta say that i LOVE this piece. You're going to be a great soundtrack writer (or already are one) so keep it up! what program do you use?