I was playing with the Hero Quest furniture and realized that it could be cool to make a game about interior design. But it could be even better if you were designing the interior of a dungeon.
The goal would be, like in regular design, to combine aesthetics and functionality. In other words, you need to make a beautiful dungeon which is still deadly to the adventurers.
I am not sure yet how it would work. I first thought that each player could control 1 to 3 room and each try to make the best out of their rooms. Or each player has a small dungeon that needs to manage.
Else, I though it could be like a tower defense game, when you set up your dungeon and once a while heroes comes in to conquer your dungeon. They might not actually destroy your furniture, but they will kill guards and make your dungeon weaker. You could then take the gold dropped by the adventurers to buy new furniture. Some characters like the barbarian could have a special ability that destroy or damage some furniture.
Else it's always the scoring the problem. How can you evaluate that a room is well designed. You could gain bonus if color match. But it's hard to evaluate the placement of the furniture.
Any other ideas?
Fashion fluctuation could also be an idea. It reminds me of another game where if everybody had a certain item it means it was popular.