Please be aware that this simulation is designed for desktop and laptop computers. It requires a keyboard.
 

Use the arrow keys to move around, p to pinpoint and space to dig. There are 10 good or OK targets and 20 junk targets. Listen to the tones to tell them apart. The game ends when you have all the targets worth digging. You may have to dig some iron if it is masking a good target.​

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Zoom your screen if it is not a good fit. It was designed for HD proportions.