Really not bad for a first track!

I like the mood you're setting here, the saw synth you're using is pretty raw yet the song feels kinda relaxed and laidback, good job on that one. In fact, all the synths were pretty well-made/well chosen. I especially like how you introduced a new synth at 1:48 to finish the whole thing off.
Now for some points to improve on! The synth in the beginning has delay, and it fits really well. However it's not spot-on with the beat, and this can get annoying because people like to have an idea about a tracks tempo. Say you had to mix this track in during a live gig, the DJ would have a hard time syncing the track because the tempo is hard to determine. However, like I said, the delay is generally a good idea!
I think we could say that the track drops at 0:21 right? It would have been cool if there was a more recognizable build-up, it would make the drop much heavier ;) It wouldn't have to be much, something like a high-pass filter right before the drop or a bar of band-passed white noise coming in like a wooooosh! Also the drop really needs something like a crash cymbal.
The beat is pretty good, but it could be better. The ride cymbal is a bit too present and also needs more emphasis on the higher frequencies and less lower frequencies. The kick, on the other hand, is a little too soft. It's dubstep, so you should bring on the same volume level as the snare (a great snare by the way). I would also suggest implementing more smaller snares here and there to give the beat that 'rolling/driving' feel, if you understand what I'm talking about.
The claps at 1:06 are pretty dry and loud. They're essential for making the next drop heavier (and they work!) but they could've used some reverb.

It might look like I'm drilling your song right into the ground, but don't worry: overall it's a pretty good track and I'm sure you'll get much better at this! That said, I scouted you for the Audio Portal, which means that everybody on this site can see your music.

Keep it up buddy!

- LiquidOoze