Jonathan Penn is one half of Rubber City Wizards, a software development and mentoring team. He has written his own games in Sprite Kit and also uses the framework as a prototyping and demonstration tool due to its incredible flexibility. He speaks regularly at conferences and runs workshops for prototyping and game development, helping bring cool ideas to life on these marvelous machines. Josh Smith is one half of Rubber City Wizards, a software development and mentoring team. Josh has worked in the gaming industry using various game engines, including Cocos2D, the game engine that Apple targets directly with Sprite Kit. He speaks regularly at conferences and runs workshops for prototyping and game development, helping bring cool ideas to life on these marvelous machines.