Mine 20 Pieces of Silver
Reach a Depth of 300 Meters
Clear 5% of the Map
Mine 20 Pieces of Iron
Mine 20 Pieces of Coal
Unlock the last stage of the game.
Unlock the secret Newgrounds treasure.
Earn your first gold medal on a stage.
Earn your first bronze medal on a stage.
Collect 20 stars in a single flight.