Alright, played the demo and I have to say it's great man!
The use of map layout, voice acting, objectives and the general environment over all makes for a really cool feeling, you have a perfect scifi atmosphere going.
And the puzzles so far are really good as well, I enjoyed how it's not just like you have to hit a button and the generator is magically fixed, but you have to go and collect a piece of equipment and actually FIX the thing.
The music as well, fits great with the mood of the game.
For some constructive criticism, the only thing I could pick at would be the lighting. Many times I could barely see where I was going and those always happened to be times where there was an intended gap in the floor. Hence...I had to restart a lot

Maybe if you just added a little more light in the pitch black areas, it would help. Just a thought
A fantastic start none the less though!
Hope to see more soon man
-Cheers