This is really cool! Nice job!
I have to say that though it is in 140, it feels slow. This could be fixed with a fast arp.

The dubstep drop is really good, though I feel that the bass sounds should be a lot louder.
Do you use Fl Studio? Or Ableton?

I'm guessing you have serum.
Also, the hihats in the drop are WAY to loud IMO.
The key change in the bit after the first drop is a little bit too shocking, and the arp sometimes is too dissonant with the chords.

Now the good things:
The sound design. Obviously, you are either really good at sound design or you stole it from someone else. If this is the case, don't. If not, I tip my hat off to you. Your sounds are really good.