This game is two games in one but that isn’t a good thing. The reason for 4 stars instead of 5 stars: There’s two kinds of levels; fun interesting puzzle-type levels that can be quite challenging and entertaining and then levels that are more target practice where there’s no strategy and you have to get the perfect speed, angle, bounce and luck. These are NOT fun nor entertaining in the least. Please stop with those. Good levels test strategy and execution. These type levels only test execution and luck. It’s almost as they have two different sets of people designing the levels. Clever ones and not so clever ones who can only come up with the lame ‘try your luck’ layouts vs. ‘use your brain and figure it out’ layouts. Fortunately, the good ones overshadow the bad ones but it is a waste of levels when they do that; very disappointing and frustrating. Developers: please stick to the strategy and leave the target shooting to other games. You have a great product. Those are very entertaining. Also great are the interface, graphics, stability and readiness of new levels. The ads aren’t bad if you decide to play free. You can shut them down in 5-10 seconds and proceed with the game. Overall, great game. I only have two games on my iPhone and this is one of them.