Looking back on it, the music makes me weirdly nostalgic now.
This is an idle puzzle game, which takes place over the course of 400 real life days.
It runs in the background.
It has good artwork, secrets, music, etc.
It requires a LOT of patience, and I am shit at puzzles but fortunately a Steam guide gave hints.
You should probably get it if you have patience and are good at puzzles (even if a lot of them aren't very intuitive at all).