Apollo4x is a game of transporting 5 resources between planets, and you have limited fuel to do so. It's a bit puzzle, a bit resource management, and some tycoon strategy. There are no build queues, and you are having meaningful interaction with your economy every single turn. There are no "other players" to compete against, but we've instead used a "time pressure" type enemy that consumes planets as it spreads across the map - because a fun game needs a challenge component, and we find symmetric AI opponents problematic in other games, so this was the best solution. Difficulty is fully in your control, and ranges from zero-challenge to something the creators can't beat, so you'll find your own best settings with experience.

Apollo4x has "4X" in the title, but this is not an indicator that we've made a "traditional formula" title like Master of Orion, or the games that follow that economic and combat model. Steam has a multitude of games that do, and do it so well that there's no point in us making a competitor to them.