This hack of Super Mario Bros. is the sequel to Air, created by the same author, U1. The vast majority of this hack is exactly the same as its predecessor, but with two major changes: all invisible coin blocks are marked and infinite jumps are no more, which results in a few changes in level design accommodated to it.
Air 2 is a trial-and-error platform puzzle game. Savestates are practically required to beat the game. Abuse of Super Mario Bros. glitches is required by design.
This run does not aim for fastest completion.