SMW The Princess rescue is a traditional Mario Adventure where you play through 9 new worlds to save the princess
This hack is more focused on the vanila elements and the level design, it features new levels, custom music, Super Mario World and Super Mario Maker Graphics and more
It also includes a English and a Brazilian Portuguese version.
This was a pretty decent hack, and long. So long, in fact, that a big issue I had with this hack is its length. A lot of level ideas were recycled later to make late-game levels. One or two levels per world could have been cut and the hack would have still been a comfortable length.
Another problem is that difficulty ramps up in the late-game not through difficult setups, but through sprite spam. Setups were there are 6 or 7 sprites on-screen are pretty common towards the end of the end of the game, and they were very difficult to get past without tanking hits.
The difficulty adjustment system is pretty cool, but it encourages just plowing though with complete disregard for your powerups since they become so plentiful. It's the only reason I didn't change the listed difficulty to hard.