That looks nice but without any instructions on how to install it or generate that sample—or even what format of data it wants for the elevation data—I'm not really sure what kind of useful comment I can make on the project itself.
[grass, dirt, sand, stone, dark grass, water, grass, wall 1, wall 2, wall 3, wall 4, window 1]
https://github.com/Grille98/2D-isometricEditor/blob/f7fe5398...