Wow, I'm loving this. Very atmospheric and evocative. Especially the intro + first part. That "lead-theme" from the intro is REALLY cool!
Not sure if you're looking for criticism on this kind of stuff, but I'm shamelessly going to say it anyway

- all subjective, of course:
I feel like you lose something with the transition to the part at 1:26. The transition is too sudden, with no real buildup. Also, these riffs don't have the same vibe to them as the rest of the track - it doesn't feel like they really belong there. I do like that you move away from the "lead-theme" and the clean melodies briefly, and I love the way you reintroduce them with the transition into the next part (1:49). The ending has some of the same problems as the 1:26-part - it doesn't really fit in, in my opinion - and I feel like it needs to climax more here. Again, this is all subjective, of course, and great job with the lead-, clean- and bass-melodies.