The first world of Swimmer18 Mario Bros., Mushroom Hill! But don't expect it to be easy...also, collect the crystals(representing Star Coins) and comment how many you found. Also, there are powerups!...sort of. Since this is platformer, I have to improvise with the powerups found in this game. A flamethrower is a Fire Flower and a jetpack is a Propeller Mushroom. (And if you make it to the castle, you'll see I finally figured out how to make ? blocks work.)