Hi, I'm the developer of this game. It was mainly designed as a highscore game, that's why there are no additional levels. If you take a look at the upper left corner of the screen, there is a score...
@ Mydniyght: Show me a bubble shooter with better graphics. I could understand, that someone doesn't like the art style. But to say, the graphics in general aren't good, well, that's just lame.
@ apollonianking: Thanks for this awesome and profound comment. That helps developers improving their games...
Just because a game is hard for someone so he can't manage to succeed doesn't mean it is bad ;-) I can't play football either because it is tough and the players don't stop to let me through and run me over instead, but it does not mean that football is a sucky game, does it? :)