That was awesome!
The idea of creating clones to move materials around is genius. I had so much fun trying to figure out the path to send the clones on.
I really have no major complaints. My small criticisms are things like the basic material boxes not spawning in the same spot, so you have to adjust it so the clones pick them up, but even that I found fun and it gave me something to do.
Incredible work! I really loved it. I wonder where this concept could go if it was expanded.