Really fun game. It always gives that bit of dopamine rush when you happen upon a vein of resources to mine. Procedural generation is always tough and you implemented it well.
For a jam game i think you should have ramped up the progression, so people can experience most of your game when trying it out. I can see from screenshots it can get crazy, but i didn't have the patience to get to that. Also it would be nice if killing mobs game some kind of reward/resource.
Good job!