Click on the screen to shoot a colored ball at the viruses. Align the color of your ball with the virus to remove it. Steer clear of hitting viruses with a wrong color, as it will reduce your score. Connect consecutive hits to achieve combo bonuses. Pay attention to the growing speed of viruses as you progress through the levels. Utilize power-ups to remove several targets at once. Target for the highest score by carefully selecting your shots. Practice to boost your precision and speed.