Got this a week ago. Once you're familiar with the game play it is quite easy. Unfortunately the game never gets harder. I have completed 1000 levels (didnt take too long) and it is the same thing over and over. The background does change themes but even that repeats after awhile. Ads are frequent. If you pay the $3 it gets rid of some of them. You can still watch ads to get free stuff (guns, cash, gems) costumes and different guns are cool. Overall fun but not challenging or deep in content