A well developed game with a story that leans too much towards ambiguity, not bad.
The atmosphere with you game is something special. I love the detailed environment, the sound design and the overall feeling of immersion is superb. The controls, set-up and execution is quite decent. Although, there are these huge story gaps, which can not be filled and it just leaves the player with this void and ambiguity - not a fan.
I've seen this being done with your other games as well and I sense the pattern, which can be resolved by giving players more info about what is going on, in terms of story, visuals, notes. I like the choice of having multiple endings in the game, but each ending should feel like a conclusion, rather than an afterthought.
Overall, solid game. Best of luck with the future projects and I do hope those games can explore themes of neglect, loneliness with more depth or give a general, simple explanation of a story.