Really liked the alien in this one, I think the idea of it lighting up when it spots you and being completly dark otherwise really worked on me, you could just spot the faint outline before the alien spotted you. I also like the story concept and figuring out why the player is alone is an interesting mystery to solve. The atmosphere is also a highlight, having the dark environment with a few lights works great with the already hard to spot alien.
My main issues personnaly is the rate of how quickly the alien seemed to spawn in my playthrough, I'd lose the alien by entering the barn only for the alien to spawn in front me 10 seconds later. It made for a lot of running for a little time of puzzle solving (does not help that the alien itself is slower than the player, so it's not a treat as long as you sprint).
There was also some issues with the physics, I had an hard time leaving the house in the beginning because the chairs would not cooperate, I think simply having the ability to pick up chairs would have helped.
I don't want to sound negative :'), it's just I wanted to mention some issues that I felted really empered an amazing alien concept and atmosphere. It's a really tense game with a terrifying alien and atmosphere that got a little tonned down because I spent the majority of my playthrough holding s and shift.
Really amazing game, hope my comment does not come has a little too negative!