Great demo! Though I only have a couple of small gripes:
- The flashlight turns off automatically during the short event cutscenes, as much as it isn't a huge deal, it is a bit annoying.
- The jumpscares were a bit weak (also a bit cliché), granted I was playing with slightly less volume and acting rather carefree in the midst of this venture, so that didn't really help either... Though I think you should make them less frequent so I'm given more time to absorb the atmosphere.
- To add to this, I would have probably been a bit more on edge of it was mostly the actual monster scaring me and not the claimed souls of fallen astronauts spawning around me every few moments. As I do like the idea you're going with, It feels too forced at least for the demo.
All in all you have something very promising, and I'm excited to see where this goes.