Kwing is right, nothing terrible adventurous here, but not a LOT to critique other than perhaps some leveling and compression, maybe structure. It sounds like low end on this song needs a lot of tightening up to sound truly clean when you aren't making use of sidechain. If you haven't cut low end off of all of your reverbs, I would do so.
Also, make sure to clean up any errant releases and/or use EQ/multiband compressors to make sure and cut low frequencies on your leads and pads so that they do not get in the way of your bass. These freqs make the instruments sound rich when played solo, but in an ensemble, you would be surprised how much of that low end interferes with your bass. A good policy is to mop up these frequencies with a multiband rather than an EQ so that 1, you don't entirely change the timbre of the instrument, but 2, you don't have them taking more space in your mix than they need to, and they stay consistent.
There are plenty of tutorials online I recommend you check out. My favorite is by Chernobyl Studios, a metal producer, but the principles come in handy for all genres of music. Johnfn also wrote a tutorial on this a while back, so you may send him a pm for that.
1:40 is a fantastic chorus. Very clean. I want a little more bass here, not quite as heavy on the sub frequencies, because you honestly have those covered.
I'm not a fan of 2:53's super high sub bass. I would switch to something with a little more grit. The in and out side-chain effect is making my head swim a bit. Also, your drums were totally hiding in the mix.
3:29, the sidechain is also excessively loud on those high freqs, and at some points I think I hear a little clipping.
I feel like there have been a few too many style switchups here and could have benefited from just being very consistent with your dubstep sound. It leaves me not really knowing where you're going.
I've also noticed that as we've progressed, your other instruments have gradually gotten louder and louder than your bass, and you seem to be writing occasionally in an area where your bass will be inaudible to anyone who doesn't have A, monitor headphones, B, bass headphones, or C, a sub woofer. I recommend staying away from those frequencies unless you are willing to back them up on something other than a sine wave sub. Sines are so hard to hear in that range.
Overall, good presentation. I can see a lot of room for growth, but if you keep at it, I have confidence that in no time you will be a fine EDM producer. Look forward to hearing more from you!
CloudNinja 
