The game adopts a top-down perspective reminiscent of retro titles like Gauntlet .
Each character possesses unique traits. For example, Marceline and Jake can float over pits, while Finn is a balanced "jack-of-all-trades".
As players descend 100 floors, they discover the dungeon is actually a massive pink blob—revealed to be Princess Bubblegum’s parents—which has expanded over a millennium, inadvertently pushing prisoners out.
The story begins with summoning the heroes of Ooo to investigate the Secret Royal Dungeon beneath the Candy Kingdom.
Prisoners have been mysteriously escaping from a dungeon deemed inescapable. Bubblegum admits she "doesn't know" why, prompting the game's title.