Once you have gained a basic understanding of LITIengine's general game infrastructure, it is time to actually create a world for your game to take place in. LITIengine uses .tmx tile maps, a universally acclaimed standard format for 2D level building.
First, you need to paint your Tileset in the pixel painting program of your choice.
Then, import the Tileset image into Tiled editor to create a .tsx Tileset.
Create layers containing Tiles, Objects, and Images.
Save your map.