In Sky, players explore a once prosperous kingdom using a cape that gives them the ability to fly. The in-game world consists of seven unique realms, each with a different theme being represented as a stage of life and a variety of areas to explore. There is also Home, a small island which serves as the world hub and the starting place when the game is opened. Throughout the world, players encounter "spirits" that allow them to unlock items in return for in-game currency, and "children of light" that give players "winged light". When a player has collected enough winged light, their cape level goes up, increasing the cape's maximum energy and allowing the player to fly farther.