Just a heads up: one of my top priorities, among other key game features that are in-process, is to enable a save game feature. As of the time of this post, you will find that every time you run the game, a new set of ores/materials/mining nodes is generated. For the moment, the intent is to give you a feel of how the game works. The save game feature will be included in the next minor release. I want to give supporters the opportunity to share initial feedback and let me know if there are any features they feel strongly about getting implemented sooner rather than later, and hopefully I'll get some of that implemented in the next minor release as well.
Thanks again for supporting this game's development!