I don’t know what it is, but I stumble on all sorts of civilization builder online games. Statebuilder is another one. This is a free to play game where you get to manage resources while you build your civilization. It requires the user to create an account, so you will need to get parental permission or use it with students age 13+.
The game could be used in several subject areas, especially social studies, math, and science. I think it even could be used as a writing prompt for English Language Arts.