WASDMove (or the arrow keys)MouseDrag to turn the cameraEDig with the detector, swing with the shovel12Detector / shovel (the shovel knocks other players flying)SpaceJumpFSell your finds at the market stallIOpen your bag

Listen for faster, higher beeps, then dig. Carry your finds to the MARKET stall (look for the gold beam): selling is when your earnings go up. Headphones help.