I think the title is pretty self-explanatory. If you have a theme suggestion for the next Official Contest, post it here!
Please read previous suggestions before posting your idea, as it may have already been suggested.
UsedHardest Level
Pipe Maze Theme
House
Futuristic Theme
Boss Contest
Glitch Level
A Touring Level
Fortress Theme
Real Life Events
Level With No Tiles
Robot Fight
Underwater Theme
Ground Theme Level
Ancient Temple
Remake of Peach's Castle
Factory
A Mansion
A Labyrinth
Obstacle Course
Amusement Park
A Tower
An Island
Scavenger Hunt!
A Castle
nin10mode:Please, make sure you can actually do something out of your theme suggestion. Provide a few ways for your theme to work, like a good tileset for it, some gimmicks to make it fit the theme more, etc. If you have to pin it down to a really precise glitch, then it's way too specific. If you have no idea how you can make it, it's impossible for the average level designer.