The cube direction was editable, now the cube referer is editable too. Thanks to this, you can ask cubes to walk on walls rather than the ground. I also changed the gravity rules to allow a momentum when the cube is on the edge. Now the cube falls only if it has no edge in contact with a terrain cube to its referer side. I added several runes to change referers and directions, as well as rotate them. This way, cubes can change rotate their direction / referer to go from the ground to a wall. Here is the complete schematics. It allows cubes to walk in concave and convex shapes, as seen in the video. There are surely other ways to do this. The "Rotate Direction" cubes are at the right and the bottom of the schematics. These features will be available in the next update v00.05.00.07 "Salmon Dirt".