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.

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.

After a while, it's very repetitious. And the best weapon can't be obtained. You can't buy it or win it. The game gives you free trials of each weapon, and then offers to let you buy it for $7.99-$9.99. Except the only one worth buying. That's not available. I'm on Level 5240, BTW. Also, it isn't true that buying a weapon removes ads. If you want more than a very small number of points for beating a level, you must watch ads. And it often crashes without giving you the points.