Pocket Gamer: Sim games have a familiar pattern. You're given a patch of land and prompted to build on it. As the population of your settlement grows, priorities shift towards catering to the whims and needs of its inhabitants.
As in real world economies, there’s an escalating spiral of demand and supply. Building huts encourages people to move into the village. The presence of people encourages small businesses to open. But businesses need supplies to manufacture their wares, whereupon a farming class arises to support them.