And now he says "Yeah, I'll do it" and everybody knows where to look for tokens :DAnother idea. If you are doing 2D mode in segments, at the end of a 2D part when you go bakc to 3D, make it possible to go back in 3D to the 2D part and then put a secret thing there. Like a token.
Anyways, he actually uses it in segments, as stated in the post with the screenshots.