The goal is to destroy the gold blocks, because only those will earn you money. Connect 2 or more blocks to remove them. You will have to get rid of all the regular rocks in order to get the most out of it. Cleverly remove the other blocks in order to get as many gold blocks next to each other as possible. You will earn more coins then.
Gold Mine is a Connect 3 game with unlimited levels, which means the time you can play is only limited by your Match 3 skills. And your greed for that matter. You would not be the first person to be seized by the gold rush! Are you a worthy Gold Miner?