Super Mario World is a platform game only available for Super Nintendo Entertainment System in 1990, As of 1995, a bootleg developer team called Hummer Team ported the original Super Mario World to the Famicom (Japanese counterpart to the NES). The game is also found in JY-120 (A) 1998 Super 45-in-1 Multicart.
Why It Sucks
First of all, this game was not supposed to run on a NES console, mainly due to its' technical limitations. This caused most, if not all of the problems listed below.
A lot of levels are missing in the unlicensed port.
Nonsensical physics. When Mario goes up a slope he ends up at the top very quickly, however going down the same slope he takes a while to reach the bottom. Shouldn't it be the other way around?
Game glitches can occur such as a section of coins being completely unable to be collected.
The Switch Palaces, Message Boxes and Star Road Warps are gone.
Ear-bleeding music. To quote Finizer: "That, my friends, is the Hummer Team V3 sound engine not at its personal best."
There is no boss music, strangely.
No continues. Losing all your lives, you are kicked back to the beginning!
The sound effects are very primitive, like an Atari 2600 game.
The game suffers from slow downs, and graphical and audio glitches.
The title screen is very different from the original version.
Banzai Bills are replaced by a trio of Podoboos similar to when Yoshi spits out a Red Koopa Troopa or Shell or if a Red Yoshi spits out a Koopa Troopa or Shell in any color.
The Item Reserve Box is on the bottom of the screen instead of the top which can confuse people.
Oddly, some levels plays the wrong music for the level. Like for example, some athletic levels use the title screen theme.
The graphics are great and faithful to the original SNES version.
The 1998 Super 45-in-1 Multicart has a completed version of this game, fixing many of the issues.
Shigeru Miyamoto originally planned to create a rideable dinosaur for Mario since the NES days, but he couldn't get it to work due to the limitations. Despite being a bootleg game, this game features a complete working Yoshi.