You are the chief of the king and you need to be able to keep your King alive, and prevent these nuisances from getting to his pile of food. Drag the ball to charge him like a catapult, and then launch him by releasing. Once landed, tap to do a short dash attack, which will target enemies in a short range in front of him. If enemies manage to get close to you, they will latch on for a free ride to the kings food pile.