"Scary" part of this games is much worse than Thief 2 had in some of the level. In Thief you could fight if you want or run away, that was your choice, not game designers and you couldn't play Rambo unless you completed game several times to know some glitches. Amnesia does completetly different thing - it says you when you should be scared, its so lame, just like in cheap horror movies.
Another thing is camera, this what made me scary that I'm gona puke on my keyboard, yeap really scary. Very bad feature that should be optionally switched off in options, it dosn't add to atmosphere only iritates + extensive motion blur that makes it even worse.
Third thing, if you add physics interatction into puzzles solving, why the heck then you "snap" physically operated objects into some predefined places? To avoid bugs? I mean imagine Valve's gravity gun that allows to grab only quest objects and pull them only into predefined places...
Next thing is a sanity meter, it works only when you stay at lit floor, so if'm stayin in a dark spot near wide window and looking at it (so I don't even see a dark) I'm still loosing sanity, what kind of logic is that? Ahhh yeap, I forgot, you need to stay at dark spot so monsters won't see you, even if you have a freaking neon projector behind you, he won't see you and you sanity will go down. Sanity meter itself is really bad in terms of effects that it does, guys, please check Call of Cthulhu next time. It would be much better if insanity effects would be linked to environment, how they should be, not just slimes and blurred (puke) vision.
So I would say in the end it's a nice try, but it focuses too much on being spooky movie than actuall game.