You have to hunt the treasure and by swimming in the sea.You should not get yourself in to the rocks or any other fishes or any thing that harms you.You can hunt extra life money and so much than that.Do not be in the sea for the long time as the oxygen will ran out.Good luck.
Use arrow keys to move in the sea try to hunt all the treasure you find.Try this game and take it as an adventure you will enjoy it a lot.Have fun!