I only had problem with the door because it was only issue I got. For examle I heard knocking but nothing happened. Or the head appeared along with the lady from the door so I was defendless. I will try now and see if its better.
To be honest, nothing special. Game for 5 min, a lot of object doesn't use collison, why? Apparently there is an option to turn on flashlight, I beat the game in total dark. It's more like tech demo or proof of work.