I'm missing a red coin somewhere. No clue where, though.
Also, when the skinny horizontal platforms have priority over your edge objects, you can connect them to the platform. It'll look a lot better that way, trust me.
The coins poking out from behind the wall look super awkward and I don't think they really have any reason to be there.
I understand and even like the concept here, but this setup is still kind of awkward. If you could find a way to make the flower visible from outside of the wall, that would be nice.
This kind of setup is interesting and I could see you doing a lot more with this in terms of enemy placement.
This is super clever, but...
When the screen scrolls down again, this piranha plant despawns.
This setup could be more interesting if I had to get the egg from below with the flower and avoid hitting the baseball boy.
What I mean when I say you don't do much to capitalize on this setup is that this entire room feels pointless. There's no puzzle to it. You don't even go to another room when you enter the door from the bottom; you just immediately go to the top.
Also, this particular cloud is totally asinine. I'd still recommend getting rid of the floating bandit hut, too.
Since Yoshi spawns in front of the spring ball there's no way to tell that there's a spring ball here.
1. Replace the ceiling object above the bridge guide with some cement blocks, it'll look better.
2. I don't see a point in having egg sprites sitting right next to the egg block.
Replace these edges with cement blocks. The BG3 fading in and out over two blocks is a waste of time.
Minor nitpick, but the fact that my egg cursor overlaps the arrow cloud makes it difficult to tell which position it's in.
The edges of the spring ball stick out from behind the foreground dirt.
I really don't see a need to continue using the fading dirt foreground in this sublevel. It's getting boring at this point in the stage and it makes this bonus room feel kind of awkward.
This egg block cuts off the bandit hut.
I'm assuming this is going to be a screen exit later, but it doesn't really look the part.