Hey there, fellow Knytt Underground superfan (superfan?) here. You got every secret but one, which is extremely impressive. The one you missed doesn't involve any new screens, but focuses on the "Invisible Friend" quest; turns out, the invisible artifact you get as a reward can actually be used to open the corresponding bell gate, provided you have one empty item slot. Thanks for sharing!
Yeah, I didn't include that one here since it's not a secret room. I've been thinking of making another KU video that goes over other oddities/exploits, so I could add the one with Laserdisc taking the invisible artifact (and also the fact that you can skip that specific bell gate without paying the toll or using the disorder by doing some difficult bounces up to the gap in the ceiling). Let me know if there's other secret stuff and references you could think of, cause I'm slowly building up a list! Other stuff I've got so far include the many references to knytt stories, weird stuff that can happen from editing your save files, the mystery "naked NPC", and the Andy Warhol style paintings in the art galleries
