I really loved the style of this game - it was very atmospheric and chilling. Unfortunately I found the jump mechanic very awkward to use. I've never seen a rigid jump used like that in a first person game before. I only managed to get a few platforms up (just below the two rope bridge type things) before I got a bit frustrated with falling down. Love the use of voice overs though, reminded me in a strange way of the game Normality.
Edit: I actually came back to this because it intrigued me so much. I've managed to get just past the rope bridge bit now, to the little fortress section. Not sure how best to proceed, but I'm likely gonna give it another go later. Guess the jump mechanic didn't bother me as much as I first thought :)