Fantastic short demo!
I really enjoyed my time with this. The atmosphere was very visceral, the visual design definitely creepy and nostalgic. I did not encounter any bugs and got scared towards the end. Only minor complaint would be to add a checkpoint system, so just in case if a player gets caught they restart from the floor they previously were on. Although, I fully understand that this is a Game Jam project and appreciate the work.
Best of luck with the future developments and with the Game Jam! Cheers!