Cities are big. However, games about cities don't have to be. Micro City is one such game. This pocket-sized game can travel with you as you travel around your actual city. In it, players are looking to build the greatest city that they can. The second edition of the game is up on Kickstarter now.
From the campaign:
Build your city wherever you want! At home, on the train, on the plane. As the name says, Micro City is a small game about building your city. Several game modes, various challenges, different levels of difficulty and random distribution of districts will make each game different!
The campaign's around 3x funded with 24 days left to go.