Hey! Thanks for taking the time to try our game and post here!
I totally agree with you. In fact, we even created the 3D asset for the repair kit but we couldn't add it to the game before the deadline. We also got this idea of a Rogulite working to some extent as FTL: you'd collect new wagons and be able to make your own train composition. It's great to see that many people have similar ideas about how we could push this demo further.
Thanks for your feedback Rommat!