So far, every stage looks really enjoyable to me... except for this one:
The level in here starts off with huge walls and a bunch of empty space already. You could've either just not leave those walls in there, or at least made use of having huge walls at the stage to include more areas at the side of the stage that can be reached either as Knuckles-only, or hide a secret path to reach up there.
This is another one of those "huge but empty as hell" areas. What does this area has to offer? Nothing but jumping. That's the only thing this area has to offer, and there's little to no danger in here at all. There could be an actual challenge in here, but there is no danger evident in this picture. Even moving platforms and spikes would be better than this.
This area screams even more for "jumping simulator". With all of this much space, you could do so much with it, yet all I imagine when playing this part of the level is "jumping" and "hitting springs". You could've made use of slopes to let the player launch themselves from a hill to another, or even made use of the Hill Top Zone features to add more of a challenge to this area (calling it Sky Top doesn't really disguises it from being heavily inspired from HTZ).
This is literally an empty hallway turned into a slight slope. I would try to suggest something you could add in here, but this has literally nothing to work with, and I probably don't even need to mention how "fun" this looks.
The biggest problem with your map, as I've said, is that it looks huge yet incredibly empty. You could've took the opportunity to include multiple paths to take and explore, yet the level looks incredibly linear and tedious. It feels as if you're just placing places and springs to jump to, and not thinking enough of how to make the level fun. It feels as if this was an addon level for SRB2 demo 2.
In conclusion, I'm not usually this blunt... just kidding, I'm always this blunt. But I'm not saying this to just be mean or let glaber down. I'm saying this in the hopes that glaber makes a huge revision to his map, because I WANT to be able to enjoy every map in here, and I want to see everyone doing their best in here.