I downloaded it and played it. Here are some things I noticed and my thoughts.
The hack is decent. Many levels are at the right difficulty, with some exceptions. It can be beaten on real hardware without save states, which is my preferred style.
Here is a video link of my playthrough. I may do another video and try and finish the whole hack at a later time.
Here are some screen shots of some things I noticed. It seems as if the hack has some color palette issues that randomly happen throughout the game. Sometimes all of the colors look just fine and then suddenly the colors change in mid level.
If you press START the screen pauses, but there are graphical glitches that appear for a second. If I had to guess, its because you are making the sprites disappear and making the screen display the sprite that says pause on the screen. Maybe this doesn't show up in the emulator but I'm using real hardware.
This jump is like way to hard for being so close to the start of the game. You have to have detailed knowledge of SMW to know how to make this jump. Holding the jump button while running making mario walk over these gaps, but not everyone knows this.
The color palettes changed mid level.
I think I pressed pause and the background got all crazy glitched out.
More glitched out background.
That special boss door that has the 3-D effect. Yeah, that glitches out the whole level.
When you open up the chest the color palettes glitch out. Also I found it counter intutive to use the Y button to open the chest. I think in SMB 3 all you have to do is run in front of it.
This level with the muchers was terrible in my opinion. It was too precise and too hard to complete. If you don't do everything just right then you don't win. The worst part is that there is no midway point. Please redesign this level so that its not so difficult.
Color pallets glitched out again.