Thank you some much for the great and detailed feedback!
I can’t believe I didn’t notice the mismatched level names, good catch! I also fixed the duplicate and miss-ordered level now and will post an update this afternoon. :)
To reach the level Editor you must go to the „Custom Level“ screen and can then either edit a pre-exiting level by pressing its „edit“ button or you can create a new one by hitting the „create“ button on the top right. Did the custom level screen not work for you or would you just prefer a button in the main Menu that brings you straight to the Editor without the extra button press?