Here's a level I'm working on in PlatGEnWohl for Utopia. It's called "Grave Danger" and it's a slightly linear level that has you trekking across the foggy graveyard, climbing down graves and mausoleums, all while holding back the army of the undead as you try to reach the goal. It is based upon Pumpkin Zone from SML2 and Newer SMBWii's Pumpkin Boneyard world.
Though I would recommend, once it is finished to turn of the fog layer while you play it in SMBX. I'll show you a screen of why you should:

Because of SMBX's crappy transparency rendering, you can't see a frickin thing!
Soundtrack: Pac-Man World 2 "Night Crawling"