Probably up to something.
Made a few improvents and uploaded the same course again. New ID is:On the first day I mostly played story mode. Last night I made a course targetted at multiplayer versus, with four distinct (but functionally nearly identical) paths. Warp boxes staying open in multiplayer makes it imperfect, though—I don’t have a way to actually force players to take different paths.
Resetting to the beginning doesn’t help, either, but I’d need at least two checkpoints per area to prevent it.
Most of the online multiplayer I’ve done has been super laggy, though. Maybe it’ll be better once that initial rush of interest wears down a bit.