PlusROM High Score Club

Game !  Directable  ! Enemies move   ! Player can move !  Lethal     !
No   !  missle      ! random         ! horizontally    !  collisions !
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Left Difficulty Switch : UP (A) for fast enemy shot.
                         DOWN (B) for slow enemy shot.
Right Difficulty Switch: UP (A) for frequent enemy shot.
                         DOWN (B) for less frequent enemy shot.