With the release of Lunar Magic, a Super Mario World ROM editor, It comes as no shock that people are going to make insane levels with it.
One example, is the Japanese, with heir brutal hack, Kaizo Mario.
Kaizo brought forth a swarm of Super Mario World hacks, that are insane, to impossible. With annoying, overused gimmicks, and stupid, but insanely obvious mistakes.
Kaizo actually made things possible, and utilized glitches and gimmicks in a fun way. It didn't spam certain traps, or overuse gimmicks.
Kaizo was fair in it's own way.
Kaizo is a pure vanilla hack.
In SMW hacking terms, 'vanilla' means using the resources you are given with absolutely nothing external added. Kaizo did this, and did it well. Which is not easy, since there are all sorts of cool things people can add to spruce up their hacks.
The graphics are unchanged from SMW, they remain as they are, unchanged, and give Kaizo the nostalgic feel it rightfully deserves.
Kaizo is a fun SMW hack, good for any masochist.
Alice likes this hack, and gives it 8/10