it's okay but it's a tad too frustrating. it obviously takes inspiration from super easy kaizo:light hacks like smw remix. this isn't necessarily a bad thing but some general design errors, a lack of development regarding some of the ideas in the level, and the overall unbalanced and stagnant difficulty curve makes this level a little hard to enjoy as it is.
(both the pipes grow and shrink)
this part is pretty cool but has no buildup. you're supposed to sync the pipes to jump across without taking a hit, but there's no in-game explanation, or
antipieces to make the player understand what they have to do here, it's just "there" and the player's first instinct is to just blow through it. and there are very few times in the level where you have to do this. i'd like this more if it had more introduction and development, but right now it's pretty frustrating, cryptic, and looks like a forced hit at first.
this is basically a waiting game and isn't fun, not to mention that the koopa can get stuck in the pipe, which is rather unsightly. i'd recommend trying to figure out a different puzzle to surround this morton coin with
this is just plain frustrating and is pretty much a forced hit, unless you just
happen to know about the koopa nearby and can manage to get its shell without taking a hit (it's right below a ceiling of munchers). i think you already have sprite buoyancy turned on, so a single tile of water above the chuck would make this a far more bearable obstacle
i had a lot of trouble getting past this part. you don't have enough room to slide-jump (because of the wiggler) and jumping off the wiggler is extremely difficult because of the length of the gap. and once you do, you have to balance mario on 2 small slopes just above boiling grape juice for 7 seconds.
also yeah the second section is a significant difficulty drop, personally i'd replace it with a shorter but more difficult section but that's entirely up to you
and finally, i noticed some slowdown at certain points in the level, usually when i was falling down in the first half. might want to look into fixing that, unless the rom you used didn't have fastrom...?
fix