Did't get too far but I'll try more later.
My feedback so far: I'm playing on an ultrawide display, and for the most part it all looks great. But the procedual tunnel seems to shift everything to the right side of the screen (maybe later I could take screenshots to show what I mean)
The way the elevators lowers a little bit before raising to the sky looked nice, but it actually gave me an idea to fake out the player a little bit. What if the first few times you encounter a platform like that, it lowers you into an underground dungeon. Then after you've come to them a couple times, you expect it to got underground, but instead it raises to the clouds.