Eliminate all the tiles matching the glazed tiles to make them equal. Select the the glazed tiles that don't have any other glazed tile on top and they have free at least one side.
Dig as much as you can to find the minerals underground. Use the lifts to go up and down. Avoid obstacles and become a rich miner. Use arrow keys to play.
Click on the same coloured blocks and get rid of the pieces. The first levels will be easy, but don't get too confident. You skills will be defied. Play with the mouse.