What a great idea regarding the theme! Quite enjoyed myself! I did just find two planets from which I could get resources manufacture something expensive in one of them and sell it in the other for even more, which I'm not sure if it fits with the spirit of the game to have only done it like this. Everything felt really far off to feel worth exploring. Maybe increasing the cost for traveling and making everything closer to each other would make it more accessible since at least time-wise it won't take as long. Same for slowing down the ship when you have resources. Instead of just making it slower, increasing how much credits it spends per second traveling would in practice have the same effect but save the player time.
Even though traveling is super simple I was still engaged during it since I was always trying to be precise with my coordinates. That was a neat touch :)
Overall, great job, the idea could definitely be worked upon and developed further with some revisions!