Sell your haul at the cart, then put your coins to work.
More room for the trip back.
Leave the terminal and return to open the shop again.
Start with a shovel and room for 10 blocks. Dig nearby dirt, return to the surface cart and sell your backpack. Walk up to the computer for tool and backpack upgrades.
Move: A / D or ← / →. Jump: Space. Climb: hold W / ↑ against an excavated wall. Dig: hold E or DIG. Hold ↓ to dig below you, ↑ to aim above, or hold a nearby block.
Harder materials need better tools. Rarer minerals appear much deeper. There is no fall damage.
Early playable version. Progress is session-only: reloading starts a fresh random map.