Ramshackle Refinery

Course (Links to images) ID Difficulty Description
Animal Crossing Adventure 4C6E-0000-0048-837C Easy - Medium Explore the world of Animal Crossing in this costume-themed level that focuses on multiple routes and various secrets! Hunt bugs and fish! Rescue Blathers from a museum infested with fossils run amok! Raid Tom Nook's store! Play a few times and see how many ways you can find through the level (you probably won't find all the costumes I included on a first playthrough).
LADIES' NIGHT  
7FAF-0000-003F-D022 Medium Guide the ladies of Nintendo through this costume-theme course to one heck of a party! It's LADIES' NIGHT at Club Goomba and that means 2 for 1 cocktails and the DJ is on fleek. You won't make it anywhere without your cutest shoes, though.
Ramshackle Refinery  
8CE3-0000-0042-EFA4 Hard I thought the factory theme with vegetation was a neat aesthetic, so I ran with it. Making use of the vines, there's a lot of up-down movement to progress. The level makes use of Builder Mario costumes to go with the theme, but there's a "secret" costume in a few more out of the way places. There are usually multiple ways to progress through this level (the end particularly features a high road and low road). This level focuses heavily on aesthetics. Hint for Hammer Bros Section: Use the Pow blocks.
Hard Hat Harbor 7CD5-0000-0029-A3B5 Very Hard (Long) This was my first level and is the least polished, but people who clear it tend to say it was very fun and worth it. This level uses underwater / airship themes and focuses on using the Buzzy Beetle Helmet to move thwomps (and sometimes Munchers) into the correct position to proceed through the level. There are a few secret areas.
/r/MarioMaker Thread Link - imgur.com