Depends on how young you mean exactly, but there's a niche space warfare simulator (simulator in the sense that it only uses currently or very close to existing technology, models the behavior of every major component on a ship, and the developer has stated that it intentionally isn't made to be balanced as their motive for making it was partially to see what kind of strategies might become dominant in a space war rather than create a balanced game, obviously a true simulator of a space war would be difficult considering one hasn't happened yet) called "Children of a Dead Earth" that I really like the concept of, and really want to enjoy, but have never been able to properly get into, because I've never managed to design ship components that are particularly efficient or effective compared to premade examples, and my experience in games like Kerbal space program havent given me a good enough understanding of the game's more realistic orbital mechanics to figure out how to maneuver my fleets properly. It feels like a game that one needs to be a bigger space nerd than I am to properly enjoy, but that same effort at realism is why I find it so appealing in the first place.