Is there some hidden message behind the two worlds that I'm missing?
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We originally just thought of that as a game mechanic, and i didn't really get that far into incorporating everything into the story. But here's my original idea: an unknown entity picked out the main protagonist because he has a weak mind (cuz hes in a depression) and feeds off of him by tormenting him by putting him in an endless office. The entity originally came from the dark world. Both the entity and the dark world would symbolise his depression. And the endless office was a symbol for him constantly working overtime.
We'll probably further incorporate all of this when the jam is over.