The free version of this game has advertisements that obscene, but touted as funny. I found them very offensive. Some of them border on porn. The free version is also glitchy, and crashes frequently. The game itself is simple enough, and a good time waster. You can get rid of the obnoxious advertisements by buying a level. It also becomes more stable once you pay for it.
WyldWoahman about Bubble Bust! - Pop Shooter, v1.62