City Hall is the main building on your Island. The population limit and number of workers depend on the level of your City Hall. As its level increases, more buildings and quests become available to you. To improve the City Hall, you need:

Hut, Cottage, Villa—choose whichever best suits your taste. By building and upgrading these buildings, you’ll increase the population of your Island. If you sell a residential building, the population will decrease. To upgrade the residential buildings, you need:

The Orange Orchard, Sawmill, Mine, etc. are production buildings. All resources are produced here. To start production, you need to sign a contract. Higher-level production buildings grant access to more profitable contracts. Gold is used to upgrade production buildings.

Shops and Stores are commercial buildings where goods are manufactured. With higher player level, the range of goods that can be produced becomes greater.

The School, Gas Station, and Gym are social buildings. Their main purpose is to increase the population limit and satisfy the needs of citizens.