Two levels I made tonight:
The only dangers in this level are a series of max-length firebars. The difficulty lies in the terrain arranged around them.... It's not a long course, but it's long enough.
The Day It Rained Fish
A tribute to 2-3 of Super Mario Bros, it's a long bridge with fish bothering you. But it's more from above you have to look out for here, and someone's carelessly left a bothersome obstacle course of blocks on the bridge to wade through. Like 2-3, the level's a bit unfair, with frequent random cheap Cheep death suddenly landing on you without chance to react. But also like 2-3, it's possible to develop a good technique on getting through this that usually leaves you unscathed. I'm work on an essay about this kind of game and level design -- it's something I've been thinking of a lot lately.
By the way... did you know you can upload screenshots from your Wii U to internet services using the built-in Internet Browser?