I'll be honest. only two stars because the game's so good but only two stars because of so many ads. at first the game starts out and the ads are very non-invasive. only when you really need that boosted reward. but then when you figure out how to get good at the game, you get an ad every single move about every 10 seconds. I've never played a mobile game. that's so simple with so many ads. This game developer is very greedy. I'm about to uninstall this game and not look back.