Alright.
So here's a real review, since this is much better than what you had originally uploaded. I'll split it up by things I liked vs. things I didn't.
Things I liked:
-While it was simple, the melody is very effective.
-Some of the non melodic sounds you used were really neat and unexpected.
-The intro was well done. I like the ambient synth in the beginning.
-Buildup to the first "drop" was pretty neat.
Things I didn't Like:
-That Epiano/Clav/xylophone sounding synth is WAY too loud over everything else.
-The first drop of the song is very quiet compared to the buildup right before it. If you read traditional music, it's like there was a sfortzando or similar there. The buildup should crescendo up to the drop and the drop should definitely be the loudest point of the crescendo.
-The drums were lacking a bit. They seemed a bit lackluster.
-It sounds like you used a compressor with a long release on the master, because whenever the basses kick in, it gets quiet all of a sudden and then the volume dramatically increases right after that. NEVER put a compressor or limiter on the master. It skews your perception of levels.
-The basses seemed to lack a clear low end, BUT don't take that as me telling you to turn the bass up in an EQ. Definitely not. Try varying the bass' actual sound. Don't always use bitcrushing! It's on every damn bass in the song! Try other effects.
-Could use a little variation in structure. Most dubstep tunes I've heard, though you don't have to strictly follow this, have more than one drop, where this only had one that I could REALLY discern from the rest of the song.
So tips in general: Take some time out to learn EQing and leveling each of your channels/tracks. Don't be afraid to turn certain elements down. Don't worry, we'll still hear them. Your music doesn't have to be rubbing right up against the 0db threshold. In fact, it shouldn't really.
You've definitely got the right idea, you just don't have the proper sounds quite yet. If you replaced most of the synths and sounds in this with better samples/synths, it would make a hell of a difference.
Sorry I was so harsh in my original review. I just can't stand music that clips all the time.