Thanks so much for testing! The "C" button was actually a bug.. it wasn't supposed to return you to the menu, you normally should have to hit esc then select "Quit".
I will update the bullets to contrast with the background better, thanks for the feedback there! I'll also look adding something for the ships. The dialogue boxes should fade out of view slightly out of view if you get close to them, and also you can disable subtitles in the options which will get rid of them altogether.
Thanks again for testing!