By using Irving's phone on his desk, the player can choose between one of several different Menu Themes, which change the design of the menu frame.
There are currently 10 selectable menu themes in the game; at the start of the game, Irving has 4 to choose from, and he can unlock more themes by interacting with special NPCs & objects and completing events throughout the dream world.
Each Menu Theme is listed below in order according to the in-game menu theme list, along with a brief description of where they can be found.
| Icon | Location | Condition(s) | Image | In-game |
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None | Default theme, obtained at the beginning of the game. | 
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Irving's Room | Obtained at the beginning of the game. | 
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Transmission Tower World | Find the humanoid fox in Waterworks Office, then go on a chase after them in Waterway Town, then Nexus and then Rainy Village, and finally interact with them in Transmission Tower World. |     
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Swamp World | Catch all of the species of fish in Fishing Hole and consult the fish book. | 
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Waterway Town | Buy 7 snacks from the vending machine in the Demon's Shop. | 
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Ramparts | Found by completing the Stargazing Event. | 
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Dreaming Serpents World | See Ending #1. | 
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Vermilion Rooftops | Interact with the bird skull in the Hoarder's Room. | 
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