Here's the code for Dr Bowsers Fortress: (07B8-0000-0020-F8D7)
Aswell other levels!
Easiest Fortress Ever Made (9008-0000-001F-0822)
The cave of pain (8ECA-0000-001E-6184)
bowser's warship (78A0-0000-001D-B46C)
Added all the new levels, as well as one of my own new levels, "Endoskelmatens."
It's a ghost house puzzle thing. Took me a while to playtest because it's rather difficult. You have to take advantage of a few ways that the Super Mario Maker system works.
For XerX and Spinda and others confused about this topic, I moved certain posts from the original topic to this one. XerX had made the oldest post and it became the first. I switched it to PaperPlayerX's post. Everything should be right now. :P