Excellent game! Very nice atmosphere, decent puzzles that expand on one core mechanic, and a clear goal to work towards for each floor. Also, floor 8 rofl.
It felt like the mid-tier enemies were all just chasing you forever, which felt a bit cheap. A more subtle stealthy game mechanic might spice things up in a more interesting way. Also, the physics were sometimes a bit wonky, or you'd get stuck on invisible colliders. This was most noticeable in the garbage floor, I think it was floor 4? Kept stubbing my toe while trying to dodge the baddies and I must've walked around the entire floor a couple of times before I found the door, which was half stuck behind a dumpster that I accidentally blocked in place :D Also, the monster animations could use some polish so they're not ice skating
Other than that I don't know what else to comment on. Very good stuff, well done!