I liked this demo overall, and I think the full game will be pretty cool if it's like the demo. However, I do think that there were a few too many jumpscares. After the third or fourth, I wasn't scared by them anymore.
I also think that it would be better for there to be a light in the train cars, instead of there being no light. If there are light sources in each of the rooms, it would make more sense (because people would be walking through them at night,) but it would also give the ghost something to mess with to make things scarier.
That being said, the gameplay itself was good. I can't think of anything I didn't like about the actual controls, or anything else.
I am rooting for this game.