A free app for Android, by SENSPARK.
If you are an avid fan of the adventure and puzzle games, and you like to play against other people, you will love this game.
The objective of the game is to gather as much wealth as possible by mining the various ores and gems in the world. The way to do this is by using a pick and a shovel to dig up the earth and get to the precious minerals.
However, be aware of the dangers that you may encounter while mining. For example, you might hit a rock and get hurt, or you might find a cave that contains a deadly poisonous gas.