Too frustrating, I gave it 5 starts in the beginning but not anymore. It was fun the first 3 levels, but after, you will have to spend money to be able to upgrade and pass the level. I spend money, but after I'm sure, I like the game, not in the beginning. Besides that, it freezes constantly, and when it freezes, you have to close it, and then you lose a life. No, thank you.