So after mulling over ideas for what felt like way too long, I have one I'm happy with. You are tasked with managing trains trying to get from one destination to another, and you must also build the tracks they travel on. However, you don't have enough tracks to actually build all the necessary tracks, so you have to try and keep trains on the right path while preventing others from derailing and crashing. Crashing the trains doesn't end the game, but it has a detrimental effect on it as a whole, both story and gameplay-wise. Finally, I can actually start making the thing!