you should be able to go to a private room, create something, then save it and display it. When you display it, it would automatically create another world in the list with your creation in it.
Great game, sad ending...
how to get past the last level:
keep jumping off into the hole and press space each time. eventually you will be able to jump off of the massive crowd onto the other side.
 "Drakensang Online"){kind=icon}
 "Transformice"){kind=icon}
 "Ghost Guidance"){kind=icon}
 "Everybody Edits"){kind=icon}
 "Starfighter: Disputed Galaxy"){kind=icon}
 "Raze"){kind=icon}
 "The Company of Myself"){kind=icon}
 "Text Adventure Creation Kit"){kind=icon}