Concept: a video game where the protagonist has the ability to travel between a sword-and-sorcery fantasy setting and the corresponding present-day coffee shop AU, and events in each world are translated into contextually similar events in the other.
All of your items and special abilities have both a sword-and-sorcery effect and a coffee shop AU effect, like an MP-restoring potion translates into a can of energy drink or whatever. The ability to cast a lightning bolt spell becomes the ability to deliver a devastating verbal quip.
Your magical companion is a helpful fairy in the sword-and-sorcery world, and an AI that lives in your smartphone in the coffee shop AU world.
There are puzzles that are initially impossible in one world, but can be manipulated into a solvable configuration by arranging events in the other.
The Big Bad is a world-devouring dragon in the sword-and-sorcery world and a gentrifying real estate developer in the coffee shop AU world, and you can win the game by defeating him in either context (with a bonus “true ending” for pulling off both victory conditions in a single playthrough, naturally).