Not only complex, I would say that an extensive game is about building cities with extensive dynamics to follow for it, each building is basically an ERC-721 token of the ethereum blockchain which is a digital asset and as such has owner. If you are looking for an entertaining game, believe me this is not, even I would not classify it as a game rather I would say that it is a city building simulator. To better understand I opened a Demo that is on your web portal and after waiting a long time since it is quite heavy, it did not show anything, to fail in that attempt to understand its logic I looked on YouTube but I did not find anything about the game. As in cities, there are assets such as Buildings, houses, districts, lands, cities.
The game consists of producing building materials that can be sold to other players who require them to build their buildings, once completed they can be rented or sold as assets. You can govern a district and even collect taxes. It can be played without having to build buildings, you can limit yourself to being a supplier of materials and earn money for it.