This is a brutally difficult rom hack of Super Mario Bros. 3. It is designed explicitly for players who enjoy extreme punishment, turning the cheerful platformer into a gauntlet of instant death traps. It is only worth playing if you have immense patience and a masochistic streak.
The gameplay demands pixel-perfect fast reflexes and memorization. You will die constantly to hidden blocks, unfair enemy placements, and cruel surprises from the very first screen. The entire experience is built around the constant threat of getting owned. If that sounds like your idea of fun, give it a shot.