Pop out the bubbles!

 A clone of the popular "Puzzle Bobble" game, in which you attempt to
 shoot bubbles into groups of the same color to cause them to pop.
 .
 Players compete as penguins and must use the arrow keys to aim a
 colored bubble at groups of bubbles. The objective is to clear all the
 bubbles off the screen before a bubble passes below a line at the bottom.
 .
 It features 100 single-player levels, a two-player mode, and online
 multiplayer capabilities. A level editor is also included to allow
 players to create and play in their own levels.