Basically all levels you have "to be edited": Fix the thumbnails (keep shift down while taking the thumbnail to make it a perfect square), Fix titles (titles in English) and remove the double walls around the puzzle, Puzzle it automatically creates the outer walls for you, you don't have to create those in the editor.
Basically all levels you have "to be edited": Fix the thumbnails (keep shift down while taking the thumbnail to make it a perfect square), Fix titles (titles in English) and remove the double walls around the puzzle, Puzzle it automatically creates the outer walls for you, you don't have to create those in the editor.