New Musician. Dubstep? HELP!

Hi! im new to the blogging world and i needed some help. I made a very short dubstep song using mixcraft. anyone own it? anyways i made it and im not sure if it is any good. if you could give me any constructive critisism (idk if that is how you spell it) and if you want to post another dubstep on this feel free to. thx ^.^