I love the style you're going for! It's very nice and eye-pleasing. Sort of reminds me of Kirby, almost.
Looks pretty interesting, although usually I'm not a huge fan of factory-type levels in SMW hacks. Perhaps you could add a little more detail to the bottom half?
It... looks pretty crazy for a World 1 level. There seems to be a lot of projectiles flying around in those screenshots. I mean, I guess it's okay if you're going for a challenging romhack, but personally I would dial the difficulty back a little bit. I enjoy all of the scenery in those levels, however.
It looks a little bit plain to me - I think it's the lack of background objects in the level aside from the trees, and there don't seem to be that many sprites in the level. In a level with flat terrain like this, you'll really want to use sprites that go in the air, like Jumping Parakoopas and the Amazing Flyin' Hammer Bro, since they'll be more dangerous in that sort of environment than a ground enemy would.
Anyway, here's what I've
been working on:
This is the fifth and penultimate level in World 1: Verdant Valley. It heavily features quicksand and shatter blocks as level elements. Quicksand in this hack sucks Mario downwards, making it harder for him to jump, but it does not affect sprites, and it does not affect Mario when he's riding Yoshi.
As such, this level also has a yellow Yoshi in it, which Mario can use to avoid the dangers of quicksand. Caution is advised, however, as the Pokeys in this level become more dangerous while you're on Yoshi.
Other enemies in this level include Wiggler, who moves at a very fast speed when you stomp on him and can be dangerous while on quicksand, Ninjis, who usually hang about on the edges of platforms, and Boomerang Bros, which can be difficult to deal with if they're at the same height as Mario. Watch out for that rebound!
This is actually the first level where I've had to stop because I reached the screen limit
. Probably for my own good, since it's rather long by itself anyway (there's also a secret area in the level that I didn't show in the video), but there are a few concepts I wanted to use that I never got around to... I guess I'll just have to play around with those in a later level. ;)