MARKETPLACE: https://marketplace.yoyogames.com/assets/8153/labyrinth-maker
ITCH.IO: https://nocturne-assets.itch.io/labyrinth-maker
This asset is designed to generate 100% solvable labyrinths of any size, quickly and easily. The asset comprises of a number of scripts plus some demo objects to show you how it can be used. All generated labyrinths are stored as DS grids for easy manipulation and use, and the asset also permits you to "expand" the generated labyrinth to increase the space between walls, making it ideal for games that require more room to add enemies or treasure or other resources.
You can find a demo of the asset from the following link:
http://nocturnegames.nocturnecreations.com/html5games/LabyrinthMaker_Demo/index.html