I liked the eerie vibe and the small narrative pieces as you are progressing.
Not sure what happened at some point. I thought you always had 30sec per floor, but reaching one of the floor, it seems like the counter didn't reset. So I only had 4 sec, which made it impossible to continue.
Game mechanic was too simple for me to want to repeat and push further, but I still have some curiosity towards learning a bit more about this world and the what is happening. I would have most probably continue if it wasn't for that bug (or what looks to me as a bug).