Gnarly is the first level in the Special Zone of Super Mario World. It is mostly a vertical level in which Mario or Luigi have to scale ropes or vines and use springboards to reach the top. It takes place in the sky.
The player will start next to a Message Block, which tells the player there is a surprise at the end of the Special Zone. To progress through the screen, the player must first go upwards. There are a few springboards the player can jump up, which will lead to a platform with four Rotating Blocks. Upon hitting these Rotating Blocks, they all sprout Vines which the player can climb up; however, only the rightmost vine will lead to anywhere useful as the rest will get stuck below Blocks. Once the player climbs up to where the red Koopa Paratroopa is flying, hitting the right Rotating Block will result in another vine growing, and the left will give the player a Switch Block. The player should use the Jump Blocks on the right side to take the Switch Block to the top. Once at the top, the player should hit the Switch Block (which will make lots of ? Blocks appear) and fall down against the right wall, and then enter the Warp Pipe the player ends up next to.
In the next screen, the player will encounter 3 Dragon Coins to the left, and three 1-Up Mushrooms to the right. The 1-Up Mushrooms will be invisible. After collecting all that, the player can simply fly over the pit to the right if they have a Cape Feather. Otherwise, the player must use the Switch Blocks to make ? Blocks appear, defeat the Amazing Flyin' Hammer Brother, and use his platform to reach solid ground. There is a Lakitu that tosses Spinys at the player right before the Giant Gate.
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