Game programming is too easy in iOS with Sprite Kit as it handles all physics for you. You just need to get acquainted to few concepts in Sprite Kit and anyone can develop a 2D game inside it. Besides its pure fun. Some resources to get started are:
https://www.bloc.io/tutorials/swiftris-build-your-first-ios-game-with-swift
http://www.gamefromscratch.com/post/2014/06/03/Game-development-tutorial-Swift-and-SpriteKit-Part-1-A-Simple-iOSMac-OS-App.aspx
Tags: 2D game programming