Great astethics, love the background and the setting, I actually had a dream about creating a game exactly like this but on a bus instead of a train, the game had an interesting design, I just wish it was a bit more polished, it has a few spelling mistakes and some bugs (like if you talk to someone and then rewind their bubble will stick), it was also quite hard to point out who did it based on the pixel characters due to them being very low res, I wish their name would be above the pixel characters in the end, since I mostly remembered all their names.
Overall it was good though, it was interesting and made me want to finish it, short aswell which is what a jam game should aim to be. Good job!