Since the Xcode project sample that comes with Moai SDK includes a bunch of things that we may not need, it's recommended to do a clean up. We'll start by copying the whole project somewhere in our hard drive. If you have been following all the chapters and have extracted all the code, a good place to put our project is in the same folder as the code samples, so that we can point at them and have our Concentration game available on iOS. You can use the source code of Chapter 7, Concentration Gameplay.
Either way, if you downloaded the book's source code, you'll find the iOS project and the Concentration gameplay implementation in the code for this chapter.
Now that we have both the Xcode project and the Concentration