i just love the lo-fi vibe of your story!
the concept is also original, and it was a pleasure to travel with the characters for a while :)
i love that you have several stories that are little pieces from somebody's lifes and i can feel that these dialogues are important to them.
one comment that i'd like to add is that i would probably love to have more connection between characters' profiles and their dialogues. maybe i'd love not only to feel their mood but also that the information i got plays some crucial role later or lets me know them better :) or maybe add a couple more details about them? just to empathize with the characters more.
the art is also beautiful! so calming to watch the train going :)