I am making a mobile game similar to zombie dash which i am going to publish on android market. It has a working coins and store system, only whenever i exit the game and re open it the upgrades and coins are gone. I am storing the Coins in global varibales, and the upgrades in global varibales also. I need to know how to save these so that when someone reopons the app, they have the stuff that they had before. All help is apprecitated! Also this is my first game i am making by myself, and it has a lot of features! Its pretty complex :L also could someone post a link to a guide on how to put ads on mobile games?