this is a neat idea and I could see it being fun if developed further. I like the music tracks and it's nice that you can change the volume. some things that I noticed could be improved:
- I could not figure out where the space merchant is, maybe some kind of a quest marker or some indicator to tell you how to find him would help (or maybe there is something like that and I just missed it, ha)
- adjusting the volume with the mouse in game make the a and d keys adjust the volume until I clicked off of it, which initially was a bit confusing.
- the rocket sound does not loop seamlessly and does not fade out when you stop the ship, making a small click sound
- could use some more sfx overall and the lazer sound from the ship could use a bit of randomization