CANTWELL By BRIAN J. CANTWELL The Columbian Deliver us from the dipswitch flier came in the mail from A Midway Chicago, which Manufacturing has a new Co. of coin-op video game. The game is called "MORTAL KOMBAT." The game's catchy slogan: "SO REAL IT HURTS!" The full-color graphic beneath that headline shows two snarling, musclebound thugs• - one laden with leather and studs, the other with a bamboo ninja hat and eyes that glow green. These two are leaping out of an arcade game and yanking menacingly at the collars of two pro a boys who, responding with goggly eyes and gaping mouths, are probably going to need to change their drawers before they pedal home for dinner.