“Hack” is a hackrom of the original “Super Mario World” game created by Golden Yoshi and released in 2010.
The hackrom offers 9 levels in all. And each level has a central theme and will ask you to test to complete it.
For example the first level called Radical, requires the player to collect 50 purple coins to complete it, another level will ask him to complete it without jumping, etc …
In short, the hackrom is excellent and well worth it.