nsmbu level tier list

A Rank
Tilted Tunnel (Acorn Plains-2 M)
Stone-Eye Zone (Layer-Cake Desert-1 M)

B Rank
Spinning-Star Sky (Frosted Glacier-1 M)
Stoneslide Tower (Layer-Cake Desert-Fortress M)
Fliprus Lake (Frosted Glacier-Fliprus M)
Larry's Torpedo Castle (Sparkling Waters-Castle M)
Haunted Shipwreck (Sparkling Waters-Ghost House M)
Swaying Ghost House (Frosted Glacier-Ghost House M)
Mushroom Heights (Acorn Plains-4 M)
Wendy's Shifting Castle (Frosted Glacier-Castle M)
Fire Snake Cavern (Layer-Cake Desert-3 M)
Urchin Shoals (Sparkling Waters-4 M)
Rise of the Piranha Plants (Acorn Plains-5 M)

C Rank
Skyward Stalk (Sparkling Waters-Leaf M)
Waterspout Beach (Sparkling Waters-1 M)
Prickly Goombas! (Frosted Glacier-3 M)
Perilous Pokey Cave (Layer-Cake Desert-2 M)
Piranha Plants on Ice (Layer-Cake Desert-Ice M)
The Mighty Cannonship (Soda Jungle-Airship M)
Cooligan Fields (Frosted Glacier-2 M)
Dragoneel's Undersea Grotto (Sparkling Waters-5 M)
Acorn Plains Way (Acorn Plains-1 M)
Above the Cheep Cheep Seas (Sparkling Waters-3 M)
Blooper's Secret Lair (Acorn Plains-Blooper M)
Giant Skewer Tower (Sparkling Waters-Fortress M)

D Rank
Icicle Caverns (Frosted Glacier-5 M)
Dry Desert Mushrooms (Layer-Cake Desert-5 M)
Crushing-Cogs Tower (Acorn Plains-Fortress M)
Morton's Compactor Castle (Layer-Cake Desert-Castle M)
Yoshi Hill (Acorn Plains-3 M)
Blooming Lakitus (Layer-Cake Desert-6 M)
Freezing-Rain Tower (Frosted Glacier-Fortress M)

F Rank
Spike's Spouting Sands (Layer-Cake Desert-4 M)
Lemmy's Swingback Castle (Acorn Plains-Castle M)
Scaling the Mountainside (Frosted Glacier-4 M)
Tropical Refresher (Sparkling Waters-2 M)