Awesome visuals and ambiance, I definitely got jump scared a couple of times, because every bit of sanity was counting. I also really liked the architecture of the house, the "old TV" shader and the looks and animations of the ghosts. After 2 runs, I figured out the strategy to wait in a corner for my flashlight to recharge and expect the direction of the ghost coming. I got to the four diamonds key, but couldn't find the next token - was it somewhere outside? I'd give it another try with a hint ;)
Couple suggestions: some checkpoints would be nice, starting the game over got a bit frustrating after my fifth try. The game was also pretty hard even on the easy difficulty (might be because I was playing on a touchpad, lol). The ghost was sometimes killing me through a wall or the flashlight wasn't immediately working, which drained like half of my sanity a couple of times. Also, after death, the game doesn't seem to be resetting correctly - the first ghost was invisible and the second was accepting the picture even though I didn't see it in my next playthroughs.
That being said, this is still an awesome project for a week-long game jam, great job! Definitely a top contender :)