Did you complete the platform challenge level full of black balls and wall jumpings, as well as the underground part with so many spiked wheels in there?
Viewing post in Pseudoregalia [Jam Ver.] comments
I believe I know what you mean but also I don't know if we're supposed to keep these comments spoiler free?
But yes, I've done both of those. Even went back and double checked to see if I missed anything.
Either I've hit a glitch or I really have just missed something obvious. Either way, I'll be more likely to catch it on my next playthrough. And I enjoyed this game enough that I'm certain I will want to replay it.