Hi,
Neat game. My ship is wedged between a boulder and a planet: https://imgur.com/a/c4te4vW. It seems like this can happen pretty easily. Bug?
Hi jaargon.
You should still be able to destroy the asteroid and free yourself. Also, if you get stuck on your side on a planet, holding 'E' on keyboard or 'A' on X-Box controller will re-right your ship automatically, which should also free you if wedged.
The game saves after you leave a system, and before you enter the new one. So, as a last resort, returning to the main menu and continuing your game will only lose your progress from when you entered the system to when you got stuck.
Hope this helps. Thanks for playing!