I will say one thing about working on this soundtrack: it has been a huge challenge, MUCH more so than any previous soundtrack I've worked on. It's not the typical stuff I'm used to composing, and I've had to go well outside my comfort box to get it up to expectations. I'm used to making soundtracks for action games rather than exploration games. I innately still try to make tracks musical/paced rather than ambient/organic, and I think that's what's been getting me into trouble.
With the elevator room track, the first few bars came into my head when I imagined the player going into that room. I didn't have a particular sound thought up for it at that point though. While the track is not musically complex, it is technically complex for purpose of emulating particular ambient sounds, which I think is more important for this type of game's soundtrack. The actual quality of the sound is something I had to experiment with code wise. I'm pretty satisfied with it, though it's way longer than it needs to be (which is a non-issue), and the ending could use some polishing, perhaps some sonic variation to keep it fresh (the luster of the second half's distinct sound kind of tires as it approaches the looping point).