Bust a Bubble! Make a Move!

At the start of each round, the rectangular playing arena contains a prearranged pattern of coloured "bubbles". At the bottom of the screen, the player controls a device called a "pointer", which aims and fires bubbles up the screen. The colour of bubbles fired is randomly generated and chosen from the colors of bubbles still left on the screen.

The fired bubbles travel in straight lines (possibly bouncing off the side walls of the arena), stopping when they touch other bubbles or reach the top of the arena. If a bubble touches identically-colored bubbles, forming a group of three or more, those bubbles—as well as any bubbles hanging from them—are removed from the field of play, and points are awarded.

The objective of the game is to clear all the bubbles from the arena without any bubble crossing the bottom line. Bubbles will fire automatically if the player remains idle. After clearing the arena, the next round begins with a new pattern of bubbles to clear.