There's a great concept in here. I would have liked the train to be a more integral experience, and the "bond" to be between the train and the player.
I could see a lot depth coming out from really embracing the theme:
(1) The player could be hooking/unhooking cars to sabotage bandits paths. (The bandits didn't actually unhook a car in my playthrough?).
(2) The player could armoring/building turrets and fortifications on the train
(3) The speed of the train could throw bandits off into traps or around turns.
I thought your presentation was the highlight, and that you were able to create a real sense of speed in your artwork. I would have loved to see that sense of speed applied in all aspects of presentation (a train whistle when max speed is reached, screen shaking, belching fire/black smoke particles, etc).
Thanks for sharing, and best of luck in the jam.