You went on a gold hunt into a deep mine somewhere in unexplored parts of our planet. You digged so deep that all gold suddenly disappeared, and you began to mine useless coal. What a shame. Get rid of all useless ores and reach the gold veins once again! In order to destroy an ore of a certain color, you need at least two ores of the same color to be adjacent. Reach the number of points required to advance to the next level and keep going till you can. Have fun.