You control two unique cannons that can fire purifying bullets! Your task is to protect the sea from pollution caused by acid rain! You need to hit the dark polluted drops with your bullets to cleanse them before they reach the water surface. You lose if even one drop of polluted water reaches the sea. You also have a limited supply of ammunition, so try not to miss your shots. You will also lose if you miss 5 bullets. So try to score as many points as possible by cleansing the polluted raindrops!