What I like:
The music and vibe is amazing.
Well done on having different screens (main game screen, maps, etc), and switching between them is quite seamless.
Great UI implementation, I rarely see UI with such complexity (pop up windows, list, etc) done in a game jam, especially that I don't see any obvious bug on the UI.
What could be better:
I'm not an art person, but I believe that for pixel arts, the pixel size should be the same for different objects. For example, if you look at the station and the planet separately, they don't seems to be in a same game.
Gameplay vise it's a bit lacking, you just buy station and ship, and that's all. It would be fine if there's some goal or penalty or timer, which requires the player to plan out their buying/expand strategy.