Make sure to check changelogs for any new changes!
soup 0.9 is a series of 8 bit levels found through Level 50, it has many sub-levels and is a mysterious level. Here you can find a list of sublevels
Rainbow Block World (enter a rainbow door)
Bookshelf Frenzy (enter a door of books)
"School" (enter a door that is white and overgrown)
If you listen to Alex F here for 0 seconds then you'll enter Level 234.