STORY:
One day, the Mushroom Kingdom was invaded by the Koopa, a tribe of turtles capable of using powerful dark magic. Their magic was used to transform all the Mushroom People into inanimate objects such as rocks, bricks, and even horsetail plants, thus spelling the kingdom's downfall. Only the daughter of the Mushroom King, Princess Toadstool, can undo the spell and restore her people back to life, but she is being held captive by King Koopa himself. Mario hears of the princess's plight, and sets out on a quest through 32 stages to topple the Turtle Tribe and save the once-peaceful kingdom.
-Official Super Mario Bros. Manual




UPDATE NOTICE:
I have updated the previous version to polish off this remake. Any way you slice it, this is the superior version of SMB1 for SMBX. Countless changes have been made to make the experience an absolute treat.
Changes:
World Map has been changed inspired by Super Mario Bros. Deluxe for Gameboy Color.
Added a "New Quest". It's basically the 2nd quest, where all Goombas are Buzzy Beetles. In addition to it, the sun sets on the Mushroom Kingdom, and nearly all enemies move at 2x speed. This can be unlocked by completing the first quest.
Snow Levels have been moved up one block to match up with other levels.
Added proper underwater background.
Added proper backgrounds to 8-3 and 8-4.
Automated cutscenes have been removed to prevent unfair deaths.
Added title screen sequence.
Added a new credits sequence.
Fixed vine so you must hit the vine block before the warp sequence appears.
Flagpole has a moving Flag rather than an invisible SMW goal.
KNOWN ISSUES (Issues I'm not going to fix):
Starmans are not present. (SMBX 1.3.0.1 does not have starmans, so they are replaced with 10 coins.)
Seesaw Platforms stick to their positions. (SMBX 1.3.0.1 does not have proper seesaw platforms.)
You can scroll left. (As much as I would love to have "No Turning Back", there were far too many glitches that it would end up breaking the game.)
World Map Pipes interrupt Music. (This was the best I could get it. The world map is based on SMB Deluxe, so suck it up. It's not that big of an issue.)
World Map Path generates akwardly. (When a path is generating, sometimes it will skip a chunk and come back to it. It still works perfectly otherwise.)
NOTICE
I am purposefully taking this remake down as a response to my SMB2 remake getting taken down.
THANKS FOR PLAYING!
Super Mario Bros. SMBX Edition is not affiliated nor endorsed by Nintendo.
Super Mario Bros. and all levels, music, and content are copyright Nintendo, and remain property and company of their respectful owners.