Hey instead I’m gonna talk about taosym's new game The Reject Demo Toko because it's cute.
Demons who aren’t born with emotions gain them by ferrying human souls to the afterlife and use that energy to do rock and roll sex magic fighting. It doesn’t matter how much sense that makes or how much internal consistency the world has or it wouldn’t make an offhand joke in prologue about a lawsuit halting demonic invasion. The game is interested it having Cool Music and being a vehicle to literalize romance and emotions in Demonic Rock n Roll Magic. Also horns look cute. That’s literally the full story and a world can exist for only those reason. You don’t need years of backstory or history or lore unless they happen to be really important. This is a world designed to be funny and emotional and it’s so simple to do that with dialogue and aesthetic and sound rather than books you find on the ground that contain a wikipedia entry about a place you don’t care about. You are writing a story okay. You are not making a wiki.
The most common mistake made with worldbuilding is treating storytelling like making a wiki.