Used by the routine at await_restart.

Clears from $5BA8 rather than $5BA0, which leaves $5BA0 to $5BA7 alone: the game seed, the frame counter, the random byte and the chosen control method. That is deliberate: the next game should carry on the random sequence rather than replay the last one, and should not ask again which keys you wanted. It falls into main.

Reached by a jump from await_restart once the game-over screen has been seen.