Successfully done simplified addictive mining game. It's well developed. However, it's pointless and not very satisfactory because mining to the end of the earth without nothing to explore feels empty to me. Showcases your dev skills well though!
Reminds me of mobile games. You developed the system well. You could improve this concept and make an addictive idler mobile game if you make the progression slower and the give miners characteristics i guess...
Reply to me if you wish to brainstorm ideas :P