If you go into the options menu and press start to return to the main menu 27 times you get a weird mode with no sound, no HUD, no timer, player 2 (cpu) has infinite health (you can't see it, there's no hud), but you have normal health. After you die the game freezes and you have to press reset. It's shown here https://youtu.be/b6jhbWyY9C0?t=82
My question is, is this a bug or is it a deliberate hidden function and either way: why
? Does anyone know more about this?