How to build a game like Flappy Bird with Xcode and SpriteKit When I heard about Flappy Bird for the first time, the hype was already in its final phase: developer Dong Nguyen had decided to pull the app from the stores in “22 hours from now“. Apart from overreacting users and an allegedly daily advertising revenue of up to 50,000 US$, the simple game mechanics were something that caught my attent