Another money grabbing game, totally designed to get you addicted then makes it incredibly hard to do much more without spending money to keep going at a good pace. It is a great game I can not deny that how ever the design fails itself by having purchase upgrades everywhere & its limited! You cant just keep playing, they limit the time & if you want to have unlimited, guess what? That's right you have to purchase the time to play. Gone of the days just playing games without paying!!!