Absolutely frustrating. I installed this game and spent money on in-game items. After completing any level I'm told there's an error and warning not to use 3rd party apps (...don't even know what it means) my game then crashes and when I return, I'm back to the first section of the game. I can blast through all 50 levels no sweat...but can't get any more upgrades as I cant hit level 5. All of my loot and progress gets lost and it's just a let-down.