With the help of Apple new Programming language Swift, Apple developer Nate Murray built FlappySwift a clone of popular game Flappy Bird. The most interesting thing is that Murray have cloned the game within 4 hours with Swift.
The cloned game FlappySwift, is for iOS 8 and he has uploaded the game in GitHub. This Swift powered Flappy Bird Clone is going viral making its own way around the world wide web.
Earlier this year, developer of Flappy Bird have took down the game and removed the game from apps store, but recently news says that once again developer is working to bring back the game, also with the some additional features.
Apple launched a free iBook on how to get started with Swift , which you can view here (iTunes link), or if you want a pdf version of the book then you can download it from here.