Really cool concept for a game! I had fun destroying those little planets.
Some in-game tutorial would be nice, not everyone read description. I also think you should simplify launch mechanic by not forcing to use mouse. Character could just fly in a straight line from a center of a planet, so the game could be more challenging.
Be sure to rate my game and leave some feedback too :)
https://itch.io/jam/blackthornprodgamejam2/rate/379272