The game requires a lot of concentration but from what you do not make the first start-up, which you create with the second or third determined. Even without in-app purchases, it seems quite good to get through the game, you just have to be able to lose. In some scenes it is a bit dark and you have to look very closely at the swarming, before finding the desired object. But I like to be called it. Therefore, there is of me clearly five stars.