I love the art style, the cover picture is a hook that made me click on the game.
The BGM is chilling and relaxing, mixing with the train's sound created a peaceful song. If you can please add more SFX to make the game more responsive, like whenever you walk to the next train booth, the stamp sound when you check the passenger...
The background looks so smooth! Can I ask how many layers you used and if you used parallax logic?
Overall: This is a nice game, well done! <3