Mirror rorriM: 3F68-0000-0090-A37A (EP)
A gimmick course I came up with on the way home from work and cranked out in about 30 minutes. There is one tough jump but otherwise a patient player should have no problem.
Invisible Boxes: 179A-0000-008D-C761 (EP)
My attempt at a Ghost House puzzle level. It is possible to get to the ending without taking damage.
Ziggest Zaggest: 6FE4-0000-008D-8EAE (EP)
The third iteration of this idea. Almost everyone who died in Zig Zag died on the first screen so I lowered the number of Goombas, and then Zigger Zagger had a 0% completion rate, so I took an idea from the Nintendo World Championship levels and used doors to let players attempt the platforming areas multiple times. The level is probably too generous with mushrooms but it's so long it only seems fair.
Simply Weird: A97B-0000-0088-F3B5 (Mrs. P)
Holly and I spent an evening unlocking the weird mushroom and this is the result. Fun and short.
A Team Effort: B337-0000-0088-CCD0 (EP and Mrs. P)
A collaboration, and a pun. Getting Yoshi makes the whole level much easier. A puzzley bit near the end.
Raccoon Run!: Normal Mode 7276-0000-0087-006F, Hard Mode 7CEB-0000-0087-0D17 (EP)
A basic autoscrolling level. Hard Mode is faster but not, apparently, much harder. As John put it, "I don't think it's possible to get the first leaf in Hard Mode".
Good Old Fashioned Mario: C4E5-0000-007D-87AC (Mrs. P)
A really nice SMB3 level. About a 20% complete rate, with 12 completions out of 18 people who played it as of this writing.