Really good concept. It's a solid foundation for adding more content later, such as upgrades between days.

My main issue is that, once you've understood how the game works, the optimal strategy seems to be buying planets almost at random whenever they're available and then fulfilling every order you can. Planet stocks fluctuate a lot and orders come in constantly, so there isn't much incentive to think ahead or commit to a particular strategy.

After one day, it feels like you've already seen most of what the game has to offer. I think the game would benefit from more meaningful decisions, upgrades, or mechanics that make you specialize instead of simply grabbing everything and completing whatever orders happen to match your inventory.

The core idea is really fun though, and I'd definitely like to see it expanded.