You can find it at the SMW Hacks section!
There are other stuff, but too lazy to write them.
A - Level Design
Having to Kill Yoshi to X
1- I had to kill Yoshi just to get a Yoshi Coin. Not nice, man.
Unfair Traps
2- Unfair trap here. You may know that there is a falling goomba, but that's because you know everything about the hack. Normal players won't know it and would die.
Badly Put Triangle
3- There must be a tile that acts like tile 0x1EB under a triangle. It even says that on the triangle description. I lost time because of this.
Badly Put Secret Exit
4- This is a minor one, but wow, the secret exits must be hard to find, not this obvious man. If you have no idea where to place it, just don't.
Unedited Levels
5- Why? Even though this is just a bonus level, unedited levels are not good. If I wanted to play levels from the original, I wouldn't have been playing this.
Unnecessary Objects
6- Another minor problem, but, only one out of 100 players would touch those spikes.
Objects That Send You to The Beginning
7- Not nice. These evil stuff will just send me to the beginning without telling me anything.
Swimming in Lava
8- When you put 1-tile tall lava, Mario can swim it. To fix this, set the acts like setting of tile 4 from 4 to 5.
Weird Level Ends
9- Ugh, why did you even put lava here? If you fix problem number 9, the level will become impossible to finish. Just delete these.
Extremely Short Levels
10- Your levels are linear, they have no exploring, you just jump and run. While there isn't anything wrong with linearity, they should be 10 (in hex) screens at least in my opinion.
Overall Rating: 1/10
Final Words: Should be remade. I wasn't able to continue because the path to other levels don't unlock when I finish the second level.
B - Aesthetics
Cutoffs
1- There is a cutoff at the bottom. This is not the only time that this happens. The cutoff at the bottom is seen quite often in this level.
Decoration
2- This part looks pretty empty, aesthetically. Needs some more decoration here.
Bad Background
3- Extremely repetitive and bad-looking background there.
Bad Palettes
4- Clouds are supposed to be smooth and fade into the back area color. Instead, the colors here are black and grey that aren't even put right.
Style Clashes
5- The foreground styles clash a lot. Firstly, you have Gamma V's grasslands, then you have original switch palace graphics, and now, you have YI-styled desert graphics? Not good.
Overall Rating: 4/10
Final Words: Needs more work. I wasn't able to continue because the path to other levels don't unlock when I finish the second level.
C - Overworld
Unfitting Tiles
1- There are green water tiles while all other water tiles are blue near the land in the bottom.
Perspective Errors
2- There are perspective errors. Lots of them. Go take a look at Teo17's tutorial.
Cutoffs
3- The waterfalls make a cutoff. Add another line, or draw a tile so that it doesn't make cutoff anymore.
Missing Layer 2 Tiles
4- There are no layer 2 tiles under the Layer 1 level tiles.
Copying the Original Tiles
5- I can still see them. The land on the bottom and the land on the right are copied from the original overworlds.
Badly Made Events
6- When you finish the first level, all events are activated, which requires the player to wait for a long time.
Overall Rating: 1/10
Final Words: Should be remade. Laziness is not good. Even overworlds should have effort in them.