I’ve settled for an idea, it’s a trading game à la Port Royale, but where you have a trucker company. You can own one or more trucks (of different power) and you buy and sell goods at factories and stores etc. Trick will of course be buy low sell high.
I intend to set the game over a square of 300 km, though I don’t know if it will be to scale much and there’s the intention of having a large amount of different resource. Regarding how it will look, there will just be a map view really, so nothing very fancy. Not sure if it will be random or hand made yet.