There's a fun idea to explore here, as other people have said its really hard to have a sense of direction here, maybe some simple art for the background like planets and stuff so you can tell how much your turning and all.
Also not sure how you wanted progression to work but I thought my ship's upgrades would stay after the next mission but it doesnt XD.
Also a little exploit where i immediately complete the objective and instead of hitting the return to base button i just keep playing and get cargo before my fuel ends, i dont think that should be a thing but idk not very clear
Not much danger present so i dont feel like there is a need to upgrade stuff, dont see a big challenge here.
I'm just mentioning things that could use improvements, your game isnt bad by any means XD just some issues i found, but the idea for this game is really good and i could see it being expanded even more, great work with this entry!