This has awesome vibes and a lot of potential.
I loved the titles, the 8bit-esque graphics and spooky sound effects. I like the sound you make when you walk, the animations, it all works.
There are definitely some bugs which get in the way a bit. One I encountered: when the door slams in the room with the paintings, you can migrate through it and get stuck on the other side, unable to re-enter or trigger the darkness phase. I had to kill the game client and restart to get past that one.
I was really confused by what killed me when going back through the house, although I now see looking at Nijelous' comment that it was the cloud thing! Maybe some kind of indicator as to what's damaging you? Or perhaps there was and I didn't see it.
Anyway, great submission and congratulations to you both on building an engaging game.