Some levels feature vertical stacks of bubbles. Consider aiming for the highest visible section and angle your shots off walls to have them reach higher. By popping a chain of bubbles that are connected to more below, all of them will fall, resulting in more points. Before shooting, examine the thought bubble layout for openings in the chains. Any bubbles that are not connected to another bubble above them will fall after they lose their link. Attempt to pop as many bubbles as possible with single shots.