Trivia: Super Mario Bros. 1
- Breakthrough Hit: Super Mario Bros. 1 was the breakthrough for Nintendo as a console game developer and the breakthrough for the industry as a whole after the crash of '83.
- Mid-Development Genre Shift: The NES version of Super Mario Bros. was going to be a shoot-em-up platformer, and Mario was going to carry guns, like a beam gun similar to those in Metroid and a rifle. Also, he was going to punch and kick enemies while empty-handed, ride on clouds (which was previously rockets in earlier development) and fire at enemies in cloud drive-bys that would soon become bonus coin stages. Also, the "jump button" was going to be "up" on the Control Pad, leaving the "A" button open for attacks.
- Saved for the Sequel: Miyamoto first planned for the game to be divided between "ground" and "sky" stages. In the sky stages, Mario would fly in a vehicle (at first a rocket, and then a cloud) while shooting at enemies with the beam gun. Those concepts never made it into Bros., but vehicular shooting stages in the sky (and sea) were later included in Super Mario Land.
- Throw It In: Spinies aren't actually originally intended to fall straight down, and there's code in the game that can be patched on that will make them be thrown using an algorithm and bounce off blocks, similar to later games in the series. Due to a bug said code wasn't working, but it seems like nobody had a problem with that and decided to leave it as is.
- What Could Have Been: At one point, Nintendo of America was planning to release the game under the title Mario's Adventure, as evidenced by this early flyer for the arcade version. Who knows why they considered changing the title, or why they ultimately decided not to.