This was a fun game. I found it kinda difficult, but I did eventually beat it. I personally would have preferred if movement and firing directions weren't tied to each other (more like a twin-stick shooter), but I also understand that's more a matter of personal taste. One thing I would have personally changed was the overworld map. From what I can tell, it's randomly generated instead of a designed map, which caused me problems. There were a few maps where I wasn't able to make it to any other system before running out of fuel from the starting system, and other times where there were system directly next to the starting system. Also, the time I won was when the closest system to the starting system was the final system, meaning I went straight from the tutorial to the final level. I would have preferred if the map was a fixed designed, and designed to specifically provide a smooth difficulty curve.
On the topic of accessibility, I found the colors for the fuel dots and XP dots to be too similar for me to easily distinguish between them. Using more distinct colors, or better yet, having the different dots be different shapes, would have made it easier for me to know what I was picking up. I kept running out of fuel in part because I didn't have a good sense of how much fuel I had actually picked up. On the topic of fuel, I feel like there should have been an indicator of what the actual fuel maximum was along side the fuel counter, as that would have helped clear up some of the confusion I had with the mechanic.