Find as much treasure as you possibly can in the Kaluha Triangle in Treasure Seas. Use the money you get from the treasures to upgrade your submarine so you can travel to deeper depths. Be on the lookout for sharks though. Too many encounters with them and it's game over for you. For more addicting games try playing Magma Mayhem, Flying Furries, and Mario Starcatcher 2. Game Play: Use your Left and Right Arrow Keys to Navigate your ship, Press the Spacebar to Drop Submarine, and Press the I Key for Items.