After playing a bit I can understand why people call this pay to play. You can visibly see your luck start to turn and lots of the time its definitely not your fault. You can play this game without spending money, but it will take considerably longer as some levels require you trying it upwards of 10 times without any boosters. This is bad design IMHO. If you have the patience to try over and over again with something you know isn't your fault then install. Otherwise find a more fair game.