Originally posted by Darolac
I must say your levels vary a lot on quality. The first levels seemed really forgettable and pretty standart; I suggest at least to add a custom palette to the ones who don't have it to at least add some personality to them. However, I must say that certain levels, such as the first castle, stroke me as really well thought with a lot of interesting setups with the custom thwomps. The level "snacktime with yoshi" was also super interesting in termes of level design.
The overworld can see lots of polish.
I just gave it a quick try for now, but i can pretty much agree here. If you use custom gfx (and therein custom palettes, too) and other levels are unedited vanilla gfx. Well, it's not hard to understand that the latter is quite bland compared to the former.
Since this is just a demo i won't judge the OW. I mean, i used smw's vanilla OW for my hacks demo, which is way worse than yours, so i don't want to complain here.
From what I've played I can also agree with Darolac's statement in terms of level design. Some levels are so creative, they could perfectly fit for an amazing hack like JUMP. Other levels seem to be pretty standard. You definitely have potential for designing levels. 1 thing i always have in mind while designing: "If the level isn't fun / interesting to me, why should anyone else like it?" Perhaps you can improve your quality, too with this simple advise.
In conclusion this is a good demo already, but with room to improve. And I'm positive, if you are willing to, this hack definitely will improve!