I found 14/15 items and i just cannot find the 15th item, and even after 3 minutes of wondering around, chasing ghosts and trying to see what gameover i get (expected a jumpscare), i still could not catch a ghost and when i did i got caught it was simply a "Game over!" text.
You do make a rather scary atmosphere and i think with a bit more work this game can become something awesome! Even in its current state though, its a decent game!