This is neat! A 3D game is very impressive - I was aware of the extension you've used but this is the first actual game I've seen made with it, and it's just mind-blowing that this was done with GDevelop.
The gameplay itself feels a little unbalanced: once you get your body out of the starting room, it's possible to pick up quite a few more keys without sending your soul out to look for them (and therefore pretty much risk-free). I also found that I was unable to sleep again even when I wanted to. The screen went black when I was standing by a bed, but never lit up again until I walked away (at which point I figure I was still awake - there was no body on the bed and I couldn't ghost through doors). That might have been because I was trying in a room with two beds next to each other, but I didn't fancy roaming around finding a lone bed to try again. I got past the first code door, but I'm guessing there's another that needs a date as a code and don't fancy trying all the date formats without even knowing if I'm using them on the right door. Still, that's a minor issue in a hugely ambitious jam game, and sneaking around in spirit form with the grim reaper breathing down my neck was hugely spooky!