World 6-Airship (Super Mario Bros. 3)
From the Super Mario Wiki, the Mario encyclopedia
The player starts on the left edge of the airship, and as the level continues there is a Bolt Lift that the player must use to reach to the next platform, after that there is another pair of bolt lifts, which once again must be used to cross a gap. After the gap is cleared the player must enter a hallway full of Rocket Engines firing both horizontally and vertically, then the player must jump upward on to a ledge with two ? Blocks one which contains either a Super Mushroom or a Super Leaf with the other one containing a coin. Then the player must go left, while dodging another Rocket Engine in order to reach the Warp Pipe leading to the boss.
The fight against Lemmy Koopa takes place on a flat battlefield, and he attacks by firing blue balls that bounce around the room and can damage the player. In order to defeat Lemmy, the player must bounce on his head, where he drops his magic wand.