I think Asteroid belts mission will be on space (or on planets with rings).
Because Asteroid belts are supposed to be on space. Like on Chicken Invaders 3 chapter 10.
So, I would be recommended to Asteroid belts on space NOT on planets (Except planets with rings).
Preview:
What do you think about this one @InterAction_studios???
If you have another idea for Asteroid belts mission, tell me on the comments