Bud Interactive, calculus rooms (version 0.1.0/preview), SwuduSusuwu2002Older version: https://video.fc2.com/content/20241223GvUt2xht
No affiliations to BUD.
https://share.budcreate.xyz/78993e (Calculus Lesson 0.1.1, has 6 equations, door passwords = solutions)
Allow upload/download: Creative Commons attribution.
Swudu Susuwu = age 26 fox, born from Amaterasu (plus unknown, Susanoo?)
Sounds: Bud-Dungeons.