Source: http://tv-games.ru/news/read/mortal_kom ... _menu.htmlOn any of the title screens of the game, you must enter the following sequence: left, right, up, down.
This test menu checks the ROM checksum, color and sound. A Sub-Zero sprite flies across the screen. There is some hint on entering the password in the menu, however, what exactly needs to be entered is still unclear. It seems that the game is still waiting for its heroes.
At the end of February 2020, Jakks TV Games Mortal Kombat support appeared in the MAME 0.219 emulator. Although emulation is not perfect, you can get an impression of the game.
Video example: