Great job on this song!
My only controversy to you is the part that starts at 01:25. While I am a huge fan of dubstep, I'm just not a huge fan of barely-pitched dubstep. It just sounds like noise. I do like the percussion, though.
Still, the rest of it is great! I especially love the brass part. It makes the song sound full, if you understand what I mean by that.
Overall, I give this song four stars. You did a great job!