Take a look at two games that simulate transportation systems. One is already available on your mobile operating systems of choice, but another is not quite there.
Osmos is already a popular game (it’s been out since 2010). There is a free demo, and the full game is available for $10. It’s a physics-based simulator, with 8 different worlds where the player must try and grow by absorbing other objects. But every move requires a loss of mass, so trajectories must be well planned in order to keep playing. Game founder Eddy Boxerman spoke with Nautilus about the game, and I think what comes across clearest in the discussion is how the same physics requires different thinking depending on the scale in which you play.
Another simulation game worth diving into is Mini Metro. It’s not yet available outside of a web-browser version in alpha. The idea is to figure out how to build a subway system that optimally serves its city. The game becomes more complicated as the city grows. Can you help the subway evolve to keep the trains on time?