Love the sidechaining, really gives the kick that punch. The first drop is nice, although maybe a slight melodic change afterwards would spice it up a bit, but the chords are nice and spooky. I really love the FX at 0:53 - 1:19. The second drop doesn't really seem to resolve. I was expecting it for a good 5 seconds before I realized the melody had moved on. The synth from this point is very pointy, maybe put an equalizer on it so it's not so jarring, then again, that might be the effect you're going for. The lack of bass in this section makes it sound noticeably "emptier". The ending is alright, though it doesn't really resolve the piece.