You are a miner on Mars. Dig for valuable minerals and sell them. Use the money you earn to upgrade your digging machine with the scarce resources that you can find and dig deeper and wider. Mind your fuel, though, do not run out of it!
Use the arrow keys to control your digger. Press I for Inventory, R for Repairs, F for Extra fuel, X for Dynamite, C for Plastic explosives, Q for Quantum teleporter and M for Mater transmitter.