I'm working on an in-chain game on ethereum
You are building either an on-chain game on Ethereum blockchain or an off-chain game. No in-chain game.
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?
It is not worth building. You must look at your tokenomics, inflation of your token when your game continues to be lively played by gamers. The more gamers play your game, the more inflation of your token will be. How will you control that inflation?
If you can not control inflation, your token will be dumped to hell. Your team will only get money from selling tokens, NFTs and it's the end of your project when token crashes with gamer selling pressure.