This is so cool. I love inertia based games. I liked the idea of trading cookies for gold and upgrading things using gold. The enemies and their behavior as well as the asteroids felt fairly balanced and did not overwhelm me. I also liked that stars twinkled - a subtle detail but still a great addition. A few changes I would recommend are making it so you would lose armor upon touching planets, making the player rotation a bit more rigid and less of inertia, but letting the ship keep moving in space instead of eventually stopping it. If you like games set in space where inertia and gravity play a significant role, check out my games Zodiac Ranger, Zodiac Ranger HSS, Zodiac Ranger 3, and Who Opened the Hatch? Also please check out my submission to the jam. It would mean a lot.