Super Mario Bros. Playthrough [Hard Mode]

Getting this one out of the way. Everyone and their grandmother's mothers know what this game is and has played it. However, not very many people have talked about and/or played the extra "Hard Mode" you acquire after beating the game. So just like my "Expert Mode" playthrough of Super Mario Land, I'm doing the same thing for this NES classic.

Quoting from the Mario Wiki:
After beating the main game, the player is given the option to pick a world (by pressing B on the title screen) to play in "a new quest"—a harder mode where all Little Goombas are replaced by Buzzy Beetles, and all enemies walk faster; all of the elevator-style lifts are about sixty percent of their original size, while Fire-Bars appear in all possible locations. Mario and Luigi gain no special powers in hard mode, and they receive no extra points when they defeat an enemy. The story remains the same, as each of the first seven castles contains a mushroom retainer that needs rescuing, while the eighth castle has Princess Toadstool. If the player finishes the game on hard mode, they will not unlock anything new from the previous time the game was finished. However, points can be gained faster by jumping on a Buzzy Beetle and then running with the shell as it hits other Buzzy Beetles and Koopa Troopas. Earlier levels in hard mode are the same as their harder clones; for instance, 1-3, which is an easier version of 5-3 in the normal game, is identical to it in hard mode.
https://www.mariowiki.com/Super_Mario_Bros.#Hard_mode

Played on Mesen via Wine on Linux (Devuan Chimaera (A.K.A. Debian 11 Bullseye))
Recorded via SimpleScreenRecorder