World 1-2 by using a glitch where you can slide through blocks, incorrectly causing the game to think you are in the World 4 warp zone. World -1, the most famous of the minus worlds, is World 7-2, but the pipe loops the level. The same applies for levels 2 to 3, however, However World -4 is a black game over screen. Originally, the world number would be 36, however Super Mario Bros uses a blank graphic for the number 36, which is why we can't see the world number.The Minus World is a world that you can get via
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