Probably one of the worst, most boring games of this kind I've ever played. The first few levels were tutorials with the game telling me what kind and where to place everything, with no way to turn it off. All levels I played limited the number of towers of each type I could place on the maps per level. Couldn't even get all features of game, until after beating ten levels. And after beating ten maps, said I was only half way through level 2. After playing for an hour, had to quit from boredom