You play the role of Miner Willy, a bold explorer and adventurer. He discovers a network of underground caverns used by an advanced but now extinct civilization, and realizes that the mines contain lucrative metal ores. Through 20 caverns, you must collect all treasures before all time (air) runs out, watching out for the nasty guardians, the obstacles, dead falls, quicksands and all elements to be found in a classic platform game.

This movie completes the Enhanced Game mode exclusive to the GBA port, which contains 10 new levels interspersed with the original 20 levels. Reading the author's commentary is recommended.