The atmosphere in this game is it's best part. The crucifix section was done well! But it is lacking on clarity of what the player needs to do.
I found myself lost a lot trying to see where I should go. The player speed does not help this as you can't explore fast enough to know where you're going.
But I think the biggest factor for me is how dark it is. It's so dark that I can't recognize that I'm opening doors and I can't get a feel on where I am or where I need to go. I think darkness is good for horror games but only when correctly accompanied by light. Darkness can be sprinkled in at the right times.
Hope this helps!