This city builder game is created in Construct 3 and has a comprehensive outline of the different mechanics that make up a modern city builder.
You can get the full template at the scirra store : https://www.construct.net/en/game-assets/game-templates/city-builder-98
Contact me on Fiverr if you want further assistance :
https://www.fiverr.com/bartalluyn/assist-you-in-creating-your-construct-3-project