World -1

''Note: this is the NES version. If you want to see the FDS version, go to World -1 (FDS).''

This is the first level of the Minus World. Just like World A-1, this level is an infinite loop. It is the only glitch level that can be accessed legitimately. In the PC-8801 game "Super Mario Bros. Special" a bonus room in World 4-3 and a "warp zone" in the end of 4-2 share the same trap - getting stuck until time runs out. 4-3's room and 4-2's broken warp zone are probably more of programming bugs rather than traps.