Your guns don't destroy anything, they shove and split rocks that keep their momentum. The only way to clear the field is to herd every drifting fragment into the black hole.
Fly your ship through a drifting asteroid field and use your shots as nudges, not weapons. A bullet splits a big rock into fragments that carry its motion, so you steer the whole mess toward the central black hole, which is the only thing that actually removes mass.
Floating rocks that split when struck is Asteroids, 1979, and its physics of conserved momentum in a frictionless field.
The original rule is that your guns destroy nothing. They shove, and the fragments keep the momentum you gave them.
So the board can only be cleared by arranging collisions, which makes every shot an investment rather than a removal. Asteroids punished you for filling the screen with small fast debris; here creating that debris deliberately, and aiming it, is the only way to win.
Mass Drift reinvents the asteroid-field arcade shooter around conservation of momentum: you never blast rocks away, you herd them. It is an original, free browser game on PlayPendium.