Double click the flag, then press play to start game. Try to catch as much rubbish as possible before it touches the fish. If a piece of rubbish touches a fish, you get -1lives. When you get 0 lives, the game ends. Press 'a' to refresh your air, but remember, it takes time to swim up to the surface! If you run out of air, you swim up to the surface slower than usual, so make sure that you refresh often! Every time you get 50 pieces of rubbish, a ship comes and dumps an extra amount of rubbish into the sea. After the ship goes away, you will get a power up of two options. Air bonus and speed bonus. Try to get the high score by catching the most rubbish!
Enjoy!