Review:
Author is permabanned, but that doesn't mean much. This hack was nice to play! Level design seemed to be well done for most part of the hack. I kinda liked the idea of the levels being colorful and each one having different palettes, even though this could've been executed much better. Overall, I think you've put effort when making this hack, then great job!
Though there were things that annoyed me while playing the hack, the fact the overworld in the hack was unedited made me feel a bit disappointed before playing the hack, since leaving things unedited doesn't give a nice impression of the hack. Another thing that disappointed me is that the Yellow Switch seemed like blatant edits of the original level. As well the weird english in your hack was an annoyance to understand. And finally, most of the jumps were a bit too hard for the start of the hack, I understand the switch blocks had to be activated but that doesn't mean you can go crazy on making too hard jumps in your hack where people would probably die many times by trying to play the hack. And please be more sane on the powerup distribution and try having a variety by putting some coin blocks as well.
This bug was an annoyance as well. It didn't happen only with Yoshi, but with normal sprites that fell off from ledges and stopped on dirt tiles, they acted weird on them as they were glitchy. That's a really bad issue that bugged me when playing this hack. I'd say you to look foward for fixing this issue in the hack.
Verdict:
Considering to deny the hack for now. It was well done, but there were many annoying things that would make this hack not be accepted. Userbase is free to express opinions about the hack.