This was really well presented and cool! Very atmospheric. Shifting between worlds was a really fun little puzzle. One recommendation I have isn't about the game itself but the itch page; when I was first playing I was doing it windowed and when I was in the dark world I was squinting to see because of the white background on the itch page. When I switched to full screen it was much much better. I'd recommend just making the page a dark color to fix that. Great job overall!