Dig to the Core of the Planet.
Played a game like this years ago, when I was a kid Robot digging through next layers of harder and harder stone to gather resources and go back. Sell them, upgrade and repeat. Funniest part is that I wanted to do the same for this competition :D Because points on this site says that 3/5 is pretty good, I think that it will be the best score for this production. It's a bit clunky and placeholder graphics are making this game a lot less juicy. So... Pretty good, 3/5