Love this game. I'm almost on level 2000 at casual playing time, so I've been playing for some time. Ads between each level, but it doesn't bother me. They don't really last that long. When needed, you can watch an ad to gain 3 lives or purchase them. You sometimes get to try a bonus weapon, then an option to purchase it, or there are the regular weapons that you can purchase with the coins you earn on each level. The costumes and helicopters you earn are pretty neat, too.

Not bad at first. Then the app doesn't recognize shots, the windows don't show anything until you lose and the stupid slow motion is a waste. This game has its problems. Deleting cause it's frustrating. UPDATE: I tried this game again and still it has "ticks". after you get to the 200 level, the shots aren't recognized. you can shoot a guy 3 times and nothing. he ends up shooting you. it costs you a shield. then the slow motion feature will cause a delay. again, another shield. you can't win!!

Great way to pass time. It's fun and easy to play. My only complaint is not being able to see weapon stats before purchasing. I hate saving for an expensive weapon only to find what I already had was better. Game does not link to any account. if you change phones or factory reset all your progress is lost and you have to restart from level one.