The reason wall jumping works is that game considers touching the wall while moving downward (i.e., negative y velocity, falling) equivalent to touching the ground, allowing you to jump again. It is generally considered a bug, but at the same time, a useful and unintended feature. One of...
Upon crossing another Goomba followed by another Piranha Plant, the player will reach another trampoline and two opposite walls to wall jump off of. An opening is present to the right; however, the player must continue to wall jump up the shaft to reach a platform to the left, and hit ...