I'm working on an in-chain game on ethereum, but before I spend more time on it, I would like to get some feedback first, so the game is about creating a town in a country, mining resources, building an army, and invading other towns, creating town shares, collecting taxes, sell it on the marketplace vs ETH, and more.

as a game designer, I can build it myself and I have friends in case I need it backers, in exchange I get loyalty for me and my backers from the marketplace when users exchange resources.
The question I'm asking is, is it worth building?
Do you play a free game on ethereum by paying only transaction fees knowing that you can sell town shares when you reach a certain level?