The theme song itself is super bad-ass. Just throwing that out there. It has a great sound to it, and just the melodies just really grab me for some reason. Like it.
I listened through some of the remixes and none of them in particular stood out to me. I not a chiptunes or remix kind of guy in the first place, but there was certainly nothing bad about them. I haven't played the game, so maybe playing some of that would make the whole concept make a lot more sense to me since this is a soundtrack in the first place. All in all though, It's an effort well done.