This game was once excellent. Had it years ago. It took thinking and strategy. No more. It is impossible to achieve 3 stars on ANY level. Prove me wrong. You can watch an add and get a sniper shot, or a bomb that kills all zombies, but then you can't get 3 stars this way. I don't mind watching an add every few levels, but the whole game is based on paying real cash, or watching adds to progress. I miss the Playstore from the "olden days" lol. Greed, greed greed.