Thanks so much for playing! Glad you were able to get the good ending, even if it was a struggle! This is another game where I can't quite put my finger on what to do next. About half the feedback is "too easy" and half is "too hard"...
As for the evidence, I see you already found it in another post, but it's basically just an extra challenge for crazy players like me who enjoy weird jumping puzzles.(You have to use all the different moves... slide jumps, upper cuts, etc) Since you found one piece, you've seen the slightly altered ending.
I'd like to go back and add a better checkpoint system. Unfortunately, I was just out of time for this jam.