Not a bad start. Definitely some fun potential in juggling resources. I feel like the biggest add would be to have some way to risk one resource to get another at the moment all resources just go down and it's luck of the draw what is found.

Being able to jump out and back into a system could represent a minor exploit since it saves a lot of resources when planets are close to the star.

I like the aesthetic, and the things you have in mind for completing sound like they could be pretty fun :) Hope you find the time to flesh it out.