I love the art for this game and the gameplay feels good. However, I feel like the game is missing something. It doesn't feel like there is any obstacle between me and winning the game. I feel like the game needs maybe some sort of alien enemy or maybe rivaling mining companies. This would make the game have a significant obstacle to overcome in addition to just making the game feel alive.
I didn't explore much deeper than I had to in order to beat the game, but I wonder what incentive there is to go deeper. If all the ores can be traded in for the same currency and everything can be bought with that currency, then couldn't you just stay near the surface and only collect those ores?