Dont use that app. Add the source http:/sinfuliphonerepo.com/, after installation, install the program Gameboy ADX Plus. No other gameboy emulator has worked for me. Once you install that, open it, and at the top left, there will be a button that says Find Game. You press it, it takes you to a site where you can download the games straight from the iphone to the iphone. Install whichever one, then play it. Good luck, hope that this helped.