Defining a new tileset # Make sure you check the Embed in map option Name the tileset as map-tileset, and also make sure you have 'Embed in map' checked. Save the map into a new file, and also create a new tileset for it, that you can do so by either clicking on the new icon in the bottom right corner under the Tilesets panel, or clicking on the File menu and selecting New, New Tileset. You can keep the tile size at 16px since the assets we are working with are 16x16. Also changed the width of the tiles to be 80x30. Make sure you set the tile layer format to Base64 uncompressed. Once you've downloaded it, open the app and create a new map. For this, I'm using the awesome open-source Tiled editor. The next step is to generate a world for Mario based on the mega tileset pack. Looking to improve your skills? Check out our interactive course to master JavaScript from start to finish.