Interesting idea!
It felt weird at first but it actually didn't take too long for me to get the hang of the controls. If you can get into a cluster of asteroids so you are always hitting something when you move it becomes easy. I like how there is a lot to explore with multiple biomes, although the game crashed for me when I got to the asteroid belt outskirts.
Really well polished game overall, I am impressed!
It could maybe use is some balance of the upgrades and fuel consumption rate etc. Some of the upgrades basically just cancel the others out.
Also a damage indicator on the ship, even just flashing the sprite red, to indicate you are taking damage would be good. I didn't realize I was getting hurt until I died from it.