In LSP's version of Fionna's and Cake's universe, many of the headshots of Lumpy Space Prince and a few of Fionna are drawn in the anime/manga style. It can also be noted that when Ice King turns the page during the countdown at the end, he turns it left to right, showing the common reading direction (right to left) of Japanese manga titles.
There is a scene towards the beginning where you can see LSP dressed up by the animals of the forest as Char Aznable from Gundam.
Features the standard "Fiona and Cake" intro song and montage.
This episode bears many similarities to the movie Misery with James Caan and Kathy Bates in which a crazed book fan abducts her favorite author. Ice King's legs are held in a similar wooden restraint as James Caan as well.