(Sorry if my english is bad, I try to do my best)
Let's go !
Welcome to YASH!
Nice introductory level, gameplays are very interesting!
I like this type of hack
Moutains Ruins #1
A nice level, good GFX as well as a good level design. But, I don't like the level music.
Mountains Ruins #2
Level similar to the 1st but vertical this time, a nice level.
I spotted this small bug, when I die in the level it
misses a block at the midway point.
Moutains Ruins #3
Different from the other, I liked the concept of the two level possibilities.
Moutains Ruins #4
The first part of the level is correct, but the second part is rather annoying.
Indeed, because of the new abilities (no spin, load on the ground, etc ...), personally I had difficulty to finish this level with that but it is only a personal taste.
Otherwise there is
the sprite bug when we get into screenscrolling pipe.
Pirahna Island #1
The Level rather correct but I think screens scrolling pipes are too slow.
Pirahna Island #2
This level is annoying because the small pirahna plants that come out of the pipes are way too slow to come out and get in.
I spotted a weird palette
here
Pirahna Island #3
Level rather fun although a bit frustrating sometimes because we do not know too much when it is mandatory to do walljumps
Also I found that
these two plants have weird move.
(The one on the right moves in all directions)
Pirahna Island #4
A Special level, I did not especially like the 2nd part it is just "waiting" because either one is propelled by cannons or one has to wait 15 seconds in the screen scrolling pipe.
Spooky's Forest #1
Just before leveling up,
there is little "2" that has nothing to do in the name of the level in the overworld.
For the level it is rather simple and correct but the music is much too epic compared to the level.
Spoky's Forest #2
Level similar to the previous one, but again I find the music too epic.
Spooky's Forest #3
The first part is correct but the second is very boring, there is too much key to find. There are too many sprites and a few blind jumps.
Also the music still does not match with the level
Spooky's Forest #4
Nice level, although the output is quite complex to find.
Lava Factory #1
This is a good level FG & BG combination is fine.
I noticed that fireballs generate a
buggy tile.
Lava Factory #2
This level is not bad, but I find the midway point wrong place it too early.
Note:
The thwoms bugs when they fall into the lava.the left tile is not present)
Lava Factory #3
This level is a bit harder than the previous ones quite fun to play.
Lava Factory #4
I like this level, the passages of the thwomps or you have to break blocks with are very well done.
Note:
The note block palette is weird
Overall, it's a rather nice hack but I find that it is slightly ruined by the new skills (WallJump, NoSpin, ...), some passages become frustrating and sometimes annoying because of them.
Also in the early world the screen scrolling pipe are very used but they are too slow I suggest a replacement of this with the screen scrolling pipe patch version.
The surprise mushrooms are pretty sadistic. I think it would be better to remove the explosions and instant damage, because it is not possible to avoid
But in general the levels are good.
I hope that will have helped you.