Hi Uboachan , i have a theory of theories. All worlds resemble to somekind of personality levels. Just think - neat worlds are on top - that could mean that Madoshowed up in reality. But there are Numbers and Candle world that look like a fear's place and somekind of mental shelter. And all scary or strange worlds are hard-reach, Monochrome and Sewers for example. So what worlds could represent Mado's personality?repost from /t/
And Monocrome desert could represent Madotsuki's memories of past, and sadness of present. Maybe all friend and family of her is dead?