Really good.
I love everything you've done there. The bassline is perfect with the eerie synth that is playing the chrods. Not much to say, but well done all together.
Things I would add, maybe a little bit of reverb on the drums (snare/rim especially) at times when the chords aren't playing, to give more atmosphere overall and maybe space the tune out as a whole. I only suggest this as the length of the tune would maybe require a bit of variation somewhere.
Another suggestion I might want to add is that maybe add some more sound effects that go with it, it's really something good you have there and subtle effects always are good at adding extra feel to the tune.
Great work.
Mechabloby 
