It is a simple story, moving despite its simplicity, perhaps because its theme (depression, the meaning of life) lends itself to it. I think we have all felt at some point like its protagonist, and that is why it also resonates with us.
I think it missed an opportunity to offer more than one ending depending on the decisions made (for example, something as simple as changing the dialogue depending on the song chosen at the end would increase replayability).
In any case, it is a simple and beautiful story that has left a pleasant impression on me.