This is the second and last true Mario game for the original Gameboy. It has unique power ups like carrots and bubbles and allows the player to go through each of the worlds in any order. It also features the first appearance of Wario, who would become a staple character for Nintendo.
This run works on both the Japanese and USA/Europe versions.
This is a 1 minute 14 second improvement over the author's previous attempt. Details on improvements can be found in the author's submission text.