Lots of courses for your faces
(SMB) The Princess is in this castle!: C17D-0000-00BE-2BBE
A level where you play as toad rescuing the princess from the castle. More difficult than your average level but nonetheless difficult. Ice Blocks, thwomps, hammer bros, and bowser are all present in this level.
(NSMBU) Dizzy and Dilusional: AC6E-0000-00BB-4861
A spin + item grab level. Not difficult, but the first P-Switch is strict. Some fun parts and some difficult parts in this one.
(NSMBU) 2 Minutes on 2 Planes: 1A0A-0000-009C-A364
You got 2 minutes. Half of the level is on the foreground, where you'll need to make some tight jumps and spinny stuff. The otherhalf, the underground, is all about precise movement and jumping. Not as hard as the next level
(SMB3) Flindoge's 4 Gauntlets: 7E43-0000-00B6-56F6
This is essentially 4 mini levels that test your skills in different ways. 1 is a reality check, kinda like "get your head in the game." 2nd is mostly setting up for the ball bustingly difficult challenges of 3 and 4. 3 is the one where you need to plan out what you'll do, as theres an ice breaking challenge that takes up 90% of it. 4 is Bowser. Lol.