Click on the aiming point with your finger without releasing it; after the future trajectory of the ball appears, aim at the right place. Release your finger as you are ready. The ball will fly and crash into the mass. You need to aim at clusters of balls of the same color, the same as the projectile itself, if there is such an opportunity. After all, complementing the cluster of up to 3 or more monochrome balls, this entire group will fly apart, bringing you closer to victory.