ScreentendoScreentendo is a desktop application that allows you to turn a selection of your screen into a playable level of Super Mario Bros. I’ve never built a Cocoa app or used Sprite Kit before, so it was a great excuse to play with both technologies. You can get the (very hacky) source code here. How does it work? When Screentendo is launched, a semi-transparent window appears which can be moved and resi
