The main goal of the game is to never run out of resources and survive 5 rounds. Each day, a train station can lose some resources: Tools, Food, and People/Workers. If there are no resources left, you lose a life.
How do you fill up the resources? Every day, a train station produces resources, but not every type. The village produces only food, while the cities produce tools and workers. Each round, you can fill up a train and send it to the next train station, but the train stations need to be connected. Additionally, if there is already a train on the track, another one cannot be placed there.
Good luck!