I really didn't like how the last version of this was so unbalanced. All of the new content sandwiched between the existing SMB3 stuff felt SUPER out of place and didn't consider SMB3's original difficulty ramp. Judging by this video, it looks like he spent more time figuring out how to make his levels pretty instead of play well. :\

And judging by how he plays in this video, he probably considers himself "too pro" to ever make the game easier. The original NSMB was way too easy, but this guy's turned to typical ROM hack "obscure difficulty" it seems.