I couldn't find where to list assets, so here they are and on the games main page.
2d sprite and stage assest
https://oberzs.itch.io/industrial-pack
backrooms asset
https://crash22.itch.io/backrooms
death sound effect:
https://pixabay.com/sound-effects/search/death/
start screen music.
8 Bit Menu - By David Renda
https://www.fesliyanstudios.com/royalty-free-music/downloads-c/8-bit-music/6
fire
https://brullov.itch.io/fire-animation
monster
https://assetstore.unity.com/packages/3d/characters/monster-scavenger-191323
ExitDoor