I should have known because paradox released it - initially the challenge is buidling a self-sufficient colony, once you do, what's the point of playing? I got so bored during my first playthrough that I haven't finished it (is there even a finish?) and I'm giving up on the game. Too bad, it had a lot of potential.
A lot of the game is just keeping things organised and scalable, I expected it to be tedious but it's quite fun. Most importantly for me, the economic aspect isn't just for show. If you build stuff and then keep it unused, you can easily go bankrupt - and if adapt and keep things optimised, you'll be raking it in. Changes are cheap so there isn't that much of "oh if I make a mistake now I'll lose the game an hour later" and decision paralysis. The interface could use some improvement - time control keyboard shortcuts don't always work so I end up clicking the buttons (which do), I also wish there was more help in locating given elements in the physical view. But in the end, it's very playable and I had a hard time breaking away from the game.