Idea 1:
The world is made up on inanimate food stuff objects: soup cans, milk jugs, raman packets, etc. These objects interact like people and live in a world of advanced technology where they can we reused/rejuvenated and essentially live extremely long lives. Each characters’ interactions with the world are governed by their limitations as an object, however they for some reason inexplicably hold objects and use all the senses humans have. As the protagonist, the guest follows a detective who is investigating a case that has been cold for over 100 years, but has suddenly received new evidence.
Idea 2:
The guest lives the life of a tree. They must find the path to the upper canopy, weather great storms, choose when to drop their seeds, and so on. As they do so they observe how the world changes over centuries of existence. They see the rise of cities and suburban sprawl, and the destruction of their fellow trees.