Over the next few days or weeks I will be willing to go through TOK again on a new file to test any theory that anyone has. Reply to me with them and I will get back to you when I have attempted them. Please try to keep them in chronological order in terms of the story.

Good chance these are already known, but in the tunnel after bombette 2.0 (kappa) kms' , when going into the mole area, it is possible to jump from the staircase to the higher up part, removing the part where you have to go around. Found this during casual play-through. Also, in the Ice temple, when approaching the spiral staircase with the two ice spikes throwing snowballs down, the game wants you to use confetti to build a path, although you can go around this on the right side. As I said, probably already known but thought no point in not sharing. If needed, I will get images for them.