Space to grow 3rd brush tile. L to delete 3rd brush tile. S to fill with area brush. Number keys for Brush types. B to brightness change. If Brightness mode on, number keys change brightness. Do not use the first costume tile. Change brush variable and click. Outline tile isn't affected by growth Now I added fallen tiles. So Outline is rarely affected by growth and if so will turn fallen and spread. Pressing L will also turn fallen tiles into ruin tiles! Purple currently does nothing.
Please run on turbowarp. It's pathetically slow with the many features and funny functions. Link is: https://turbowarp.org/960693069 or if you have the icon from scratch addons, you can just click there and it will open new page.