Been playing for about an hour, and I just love it so far! Too bad I got caught by the Lurker in the room with the switches because I suck ^^;
Anyways, the overall dark and intriguing atmosphere can be oppressing at first (especially when the mysterious voices start) but never overwhelmingly terrifying, aside from a few kinda gruesome details. :p You just want to know what happened there and what those "things" are. It's not full horror game scary, and that's why I like it. Oh and you really feel for that poor little robot guy!
There is also a lot of attention to details: I love the fact that you have to search every nook and cranny to get items, components, docs, and clues to keep you going. Exploration is very well done, engaging and rewarding, and so is the crafting element. Upgrading the main protagonist seems really fun and I can only hope it'll lead to a lot of customization options later on.
Just a couple of things: It seems some passageways for doors leading south don't have an animation, you just step on a tile and get teleported. Is this a known issue? If not I can tell you where that happened.
Would it be possible to bind a controller key to open the ring menu? Just more convenient for people playing with a controller.
In any case I'll keep playing to see everything the demo has to offer, and I'll be looking forward to the complete game. Great job!