Level editor, new features and bug fixes...

Version 125.9 is live: [list] [*] Added level editor so you can modify existing levels and create new ones [*] Mouse pointer is automatically hidden when you close the menu [*] Target level name is shown when you stand over the entrance of already solved levels [*] Fixed alternative undo key mapping. Now you can undo with both U and Z, or configure a custom key. [*] When playing with a controller, added an option to go back to the parent level by pressing X, just like in the Nintendo Switch version (which will release on October 10th). [/list]