The game has a wonderfully eerie, melancholy atmosphere and does a great job of using language, imagery and story beats to give the impression of a world breathing it's last breaths.
It manages to maintain a dark atmosphere throughout its length without becoming an unfun slog, thanks to puzzles with solutions that are intuitive without being brainless. They are satisfying to go through and none of them are so out-there as to undermine the mood.
Not to spoil anything, but the plot is enjoyable for similar reasons, with enough details scattered around to let you make some pretty informed guesses about how characters and events relate to one another before they are confirmed outright later on.
Overall, a depressing adventure that put a smile on my face.