File:Artg cloudw portal.jpg
Art Gallery portal
File:Cloudw1.jpg
Cloud World Red
File:Cloudw2 portal 2.jpg
Cloud World portal
I found another world in Art Gallery and this world is the clouds, but when I was trying to access it the game tells me an error saying I need a map file, these images are of a video on Nico Nico Douga I saw before.
Link: http://www.nicovideo.jp/watch/sm25245640 (date: 31/12/2014)