I really like this entry, although it did take me a few minutes to parse the instructions and figure things out. It was really satisfying to organize the colors and try to shuffle things out of the way :) I seem to be running into an issue (maybe a feature) where the pieces will just disappear when a piece is double clicked, and I often get stuck with unmovable black pieces. Perhaps that's intended, I just didn't understand what was going on :D I really like this concept - great submission!