Shoot unneeded bubbles to break wood and other objects. Many levels have multiple screens but cannot scroll up if lower bubbles and debris remain behind. Try to drop from the top when possible, especially when you need to free a creature. Note how pigs and other animals are positioned. If they are being held in place by a single line of the same-colored bubbles, break that chain. A single bubble can break two pieces of debris. Hit two adjacent pieces with a single bubble by aiming between them to save moves. When there is a stack of debris, aim for the upper planks to drop the lower ones. You can clear the obstacle efficiently and improve your score.