They give you enough coins to get really into the game so by the time you run out, youre addicted! 99 cents for 100 coins seems like a deal until you have to pay 3, 4, 5, etc coins per game to redo a level otherwise back to level 1. I ended up removing the game since I went through 100 coins in like 2 days.
415citygirl about Bubble Shooter - Addictive!