This is quite frankly, the weirdest game I've ever played. Thank you for that.
Here's the first part of my playthrough, if anybody's interested:
[SPOILERS AHEAD]
I thought I played through the entire game, but some of the screenshots are unfamiliar to me. Did I miss something? I did see there was a (locked) secret world teleporter in world three, but after the ghost-lady in the hub ended the game for me, I just assumed it was over...