Player with 3 lives maximum navigates underground mine shaft to collect ores and resources whilst avoiding bats, moles (these deal 1 damage each), can pick up pickaxe to increase movement speed (lighter pickaxe in theory). There are also worse pickaxes which lessen the players movement speed when picked up (Heavier in theory). Game would be 2d on screen, static. Game is timed, player can get in and out with materials gained before mine collapses. If a set score is reached, gain a new life, if they have 3, gain an amount of score.