Been playing this offline game for about two years, it never gets old. Not just a kids game, but takes alot of eye hand coordination as well. At level 32 now and it just gets more difficult. I enjoy the challenge. Playing offline and online as well. Online you can collect more gems by doubling. There are no ads unless you want to double or continue a level that you just lost. Then its only one ad. A very addictive game. Earn more coins by shooting the enemy. Coins are easy to collect.