Let us compare three versions of Super Mario Bros. on Switch hardware:
: Warp zones are restricted; for instance, World 4-2 no longer allows you to skip directly to World 7 or 8. Arcade Archives Features
Six levels were replaced entirely with designs that later appeared in Super Mario Bros.: The Lost Levels (the Japanese Super Mario Bros. 2 ), which are much more challenging.
: Infinite 1-Up tricks (like the "turtle shell on the stairs") have been removed in many spots by replacing Koopas with Goombas. Only four 1-Up mushrooms exist in the entire game.
: Enemy and item placements are altered to provide a tougher challenge. You will find fewer power-ups and 1-ups, and they are often moved to harder-to-reach locations.