At first it all runs very smoothly, nice graphics, easy gameplay, funny cartoon illustrations and good progression. But after a while youre as well as stuck with upgrading your guns, it becomes incredibly long to gain coins. To explain, pretty soon youll need 5000 to upgrade a perk(upgrade to your gun) which doesnt change significantly its power and to get them it takes hours because the rewards in coins nearly dont increase from the noob map to the tougher ones. More sweat, same gain. Gets boring. And the in game purchases are insanely high for what its worth. Usually I pay but this time they are way too greedy.