More than I’d do in a year
After getting The Forbidden Psalm rules PDF - https://www.drivethrurpg.com/product/351472/Forbidden-Psalm - I had an idea for a setting for a miniatures game.
I think I might call it Demonscape.
You are a person who wakes up in a world where demons dwell. The demons are often giants, and generally do two things - fight each other and torture people.
Your job is to group up with others and survive. You need to scavenge food and shelter and avoid being captured by demons. Your ultimate goal might be to escape this nightmare world. I think encounters might involve fighting other groups while avoiding demons fighting each other or hunting people. So a scenario might involve playing amidst demons battling, avoiding being noticed or stepped on or run through with a demon-sized skewer.
I am more inspired by the look of the place - inhospitable, strewn with broken demon weapons and out of scale for humans. Structures are whatever demons have magic-ed up but nothing more complicated than angular slabs of concrete or stone, metal bars and chains. They don't need to decorate their structures, they are mainly for defense or shelter while fighting and hunting.