The demo has me hooked.
Definitely picking this up.
I died like 6-7 times and this was the first 2 levels on easy. Can't wait to get my ass handed to me on the harder puzzles.
Plus its SOOOOOOOOO cool, stylistically.
The way you interact with people is also great. You respond via text messages, and in each response you have several lines you choose where you can choose what to say in each of those lines. It seems your responses will tip you certain ways "morality" wise, which will affect the story, as well.
Check out the demo, its pretty cool.