FWIW, I liked the colors, but totally misinterpreted them (I assumed the color represented a single value on a gradient, rather than two channels), and I almost

FWIW, I liked the colors, but totally misinterpreted them (I assumed the color represented a single value on a gradient, rather than two channels), and I almost missed the "next page" link at the bottom I also thought it would be better to have the starting point inside the convex hull or the ending point higher behind it, so that the algorithm would look further than 1 square in the counter-heuristic directions. As it is, the heuristic was exactly correct about the length of the final path, it just happened to start searching to the right instead of starting straight down.