The vocals, where did you get the vocals? They really go with the song really good! In fact, it would be awesome if you used them throughout the song. Well... throughout the song... if it were a little more than thirty nine seconds long. It does loop really good though.
The guitar is really awesome in this piece. The drums are pretty simple, but do add to the song overall. The sound effects really add to this piece as well. I think you could take the guitar of this and make it into a much darker heavy metal song with a little tweaking. You might want to revisit what you did here someday.
Anyway, it's been a long time and I felt like reviewing a piece of audio today so I figured I'd drop by and give you a review as a way of saying hi.