I agree with b0b3rt
Especially at 0:11 the main melody sounds very unclear, as if the tempo suddenly changes. Also, maybe it's a good idea to sidechain the hi-hat that hits every 2 steps, to emphasize the kicks more. Nice melody and synths though, nice subtle variations in the melody. Then again at 0:52 an unclear part which kinda ruins the flow, such a shame. At 1:41 the mood of the song changes, so maybe it's a good idea to add a little effect / sweep. Then again, you said you're going to change that. Maybe add a sub-bass to the dubstep part? I find it's lacking energy, but maybe that's also because there isn't really a buildup to it.
Nice little demo though, looking forward to the full track.