This game has debugging material.
Nekodancer Is Atelier 801's 4th game running on the same engine as Transformice. This time around, it's an Online Dance Dance Revolution game with Cats and people don't have to step on arrows like a toddler about to piss themselves to win.
Because this game runs on the Transformice engine, it carries over the debug mode, which strangely has no noticeable effects.
Type /debug into the chat and start a new round for debug mode.