I rushed through the first 10 minutes of the demo before going to university - and I was late, lol.
I gotta say it's pretty hard at first. Probably because of the wobbly-ness of the physics. But I got used to it after a while.
What I didn't get used to is the soundtrack. It's much more irritating than in the gameplay videos and doesn't provide an atmosphere at all. I liked the background artwork (not so much the characters). It is, however, very uninspiring.
Not much atmosphere to be found here, in my opinion. :/
I'll still play the rest of the demo and rip the music, but I don't think I'll play any more of it after I finish it and the final game 100%.