I have the same problem with my iPhone 5. It started after I was finally able to purchase more coins (an issue I raised here on the message board with no response), but they wouldn't download into the game. I tried reinstalling it many times from both my computer and the phone itself via iCloud, but it still won't work. It's really disappointing that we've got to use this means of contacting Fallen Tree Gamesand get no response. Great game - if it works.