I really liked the art and general atmosphere of your game, some decent writing too!
I felt like if there were smaller rooms between air, but you had to do time consuming tasks in those rooms, it would ratchet up the tension further.
Like having to weld, or push something. Any action that takes time, especially an unexpected one.
I do like the tension of not knowing how far you have to go, but there's something to be said for a one room set-piece as well!
Only issue I had while playing was that sometimes in the topdown segments I was a little unclear on where I could and could not walk; sometimes what I thought was a wall turned out to be a path, and so on.
Thanks for sharing!