Not happy with this app. I tried getting into my old game and it says that I need a code, which gets sent to me. I input the code and it keeps saying "Invalid Code", so now I'm playing a game that can't be saved. In the new game I'm playing, once I buy Donuts, it won't let me buy any more until an update comes, and then it only allows me to buy one set of Donuts again. Please fix.