Dig and fire
You start on a small rock with your bare hands. Press Dig to pick up rubble, then Fire to sell it for Lumen, the money here.
Orbitwright
Dig a tumbling rock by hand, then hire crews, chain smelters and fire cargo home. Five worlds, five rules, one orbit to raise.
Build a base
Spend Lumen on Riggers who dig for you, Smelters that turn rubble into metal, and a Mass Driver that fires by itself. Machines sit in slots on rings around the rock.
Raise an orbit
Ship enough Lumen from a rock and you can Depart to the next world, each with its own rule. Finish all five and Relaunch to start again, stronger.
One voyage takes a couple of hours of play. The game saves on its own, and your base keeps working, more slowly, while you are away.