Not gonna lie, "No chance of winning" is just an excuse for the lack of any goal. I had ideas about adding black holes or space stations as goals to move towards, I'll look towards adding that in the future.
At the moment it's not really a roguelike, I need to add more "bonuses" (propulsor, magnet, shield) for it to be one.
The idea behind "boosting while out of fuel" is that you are using a reserve for emergencies, I understand how it can be confusing to the player because I didn't communicate that correctly.
Thanks for your detailed feedback, I will keep it in mind when I develop the next update.