[2020] My idea for a minigame, wall hall, awfully made in blender

We actually tried something like this early on with giant rollers! You have to be a bit careful with the giant walls as they can really obscure the camera in odd ways, and sliding all the way back down a level isn't super fun.

Ultimately we felt like doing it with physics objects (see the mid section of Dizzy Heights or Fall Mountain) gives the same feeling, but with a more slapstick vibe. Cool idea though! I do think we could make a full Round out of something like this one day!