--- I N S T R U C T I O N S --- USE W, A, S, AND D TO MOVE USE W, A, S, AND D TO MINE F = FUEL H = HULL (HEALTH) You can use your mouse or the keys listed in the shop to navigate the shop. You can save your cash and components by clicking space. --- D E S C R I P T I O N --- The concept of the game is simple: Dig as deep as you can. Upgrade your drill, engine, fuel tank, cargo bay and hull to help you on your way to the core of the world!