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The cover art for the song "Beyond the Stratus" depicts Deemo and Alice riding a hot air balloon. The full image reveals that the balloon is in the shape of a Mandora, a reference to another game by Rayark. This is also likely a reference to the song "Hot Air Balloon" from Cytus, which is the main theme to Mandora.
Contributed by DrakeVagabond
The background images of Alice for the songs in the "Book of Celia" Collection will change to an image of Celia if the player makes a full combo or full charming score on said songs.
Contributed by DrakeVagabond