The game is fun however I would not recommend purchasing any of the premium shop upgrades for more coins, no ads, ect if you intend to play this on multiple devices. You can lose your account on their cloud services and the developer will not answer any emails you might send to resolve the issue. TL:DR. Play the game and enjoy it for the idle game it is, but don't spend on it. You WILL lose your account if you use the cloud service and recieve no support.