Aerial Garden 2, in the current Mystic Realm, barely skirts the restriction. If you notice, the player starts facing south, goes into a long passageway with a bunch of gargoyles, and then ends up facing north for the 6 large rooms. At the end of the large rooms, I make the player go south again by going in-between the large rooms, compressing the space as much as possible. Basically, if I didn't do that, the stage would break the 32K limit. Originally I didn't have that passageway with the gargoyles, and that's how I found out about the limit to begin with. By orienting the room on the edge the other way and adding a little passage to turn the player around, I got around that restriction. If you're having trouble with the 32Kx32K limit, I highly encourage you to look at AGZ2 to see how I got around it.
Neo Aerial Garden Zone, the remake for 1.1, has AGZ1-4, STPZ, and ISZ in the same stage, and that stage is 64Kx64K. However, 1.1 has a fix for the blockmap issue which solves this problem. I actually made the remake originally as an easy way to make a stage far too large in order to test the fix.