I really liked the demo. The game play feels good!
My small concerns are:
1) It feels like after the factory some game play shake-up will be needed (by the end of the factory it started to feel slightly stale). New enemies or other mechanics besides looking for keys will be nice.
2) The enemy robots all similarly look like gray waste bins. Not to say they look bad, but I wasn't able to distinguish between them fast enough to avoid damage occasionally. Maybe repainting some of their colours could help. Or anything you can think of. Or do nothing. It didn't bother me much!
It was good! The 'cold open' was a nice style choice. Fun fun fun.