I really liked this game!
Orange dice - I could never track which dice it was changing, consider having it pick the five random dice before hand. That way the player can weigh the risk of
Yellow dice - Needs a better explanation, I only understood what was going on when I read your out of game explanation. My quick fix suggestion would be placing the example you made in the mouseover explanation.
Black - Haven't been able to try this out yet, but I assume it rolls as a way to figure out which black will steal from the other if it shares a row with an enemy black?

