In Super Mario Boat Bonanza you have to dodge all the enemies on screen whilst grabbing coins and green mushrooms. The goal is see how many coins you can grab before you die. The screen doesn't move though, instead the coins, mushrooms, and enemies scroll across the screen. Jump up using the up arrow to avoid enemies/grab items. Each green mushroom you grab is worth an extra life just like in Super Mario Bros. so it is worth it to grab all of them at any cost.