Not a bad first attempt.
Better than mine ^_^.
Okay, where to start, make sure you're going at 140BPM, stay away from your usual 8BIT sounds, it gets a little clustered at the beginning. Also, try to make sure none of your sounds distort (When the snare hits usually for you) I like the merger from 8BIT to dubstep, however your drop was nothing. You need a heavy sound for the first hit. I can give you tutorials, etc if you want via MSN. I would love to give you a helping hand. However, please have some presets ;).