WOW this game is the best!!
The core part of this game is the puzzles, they are well taught. In the beginning they are really easy, but afterward the harder ones are quite a challenge and that is good. You get this feeling after a solved puzzle oh why did I not think of that.
What is the best part of this game is the atmosphere. You get scared of everything around you, EVEN SPIDERS, creepy little things. Everything could make you jump like never before, even the silent hill series are nothing compared to this, in my opinion.
What I do not fully appreciate is the combat. Even if it is not the core thing of the game it could of been tweaked a bit more. It is kind of hard to hit a creature with a rock when you have to swing it with your mouse. It is probably just me who is a new guy to these point and click games and hardly even know how it works.
Overall this game is awesome and really surprising, it got me hooked until the end. Give it a try, but it is not hardcore action, you have to be patient and calm or panicking could kill you.