To craft goods, you must first build the Crafter buildings. Each Crafter comes with its own specific recipes for goods, and you can unlock more of them by upgrading the building.

Tapping on a Crafter building opens a crafting menu, where you can see the craftable goods, their resource requirements, and the timer required to craft. To start crafting, choose a recipe, ensure you have all the necessary materials, and then tap the “Craft” button. 

You can queue multiple craft orders to be produced one after the other.

Once they are ready, you can collect the goods from the bubble above the Crafter building or from inside the building’s menu.