The new float/chance system allows for ores to appear at different chances dependant on the player's current depth. The same ore could be at certain depths inevitable or not appear at all.

The miners concept was the one I really wanted to create and I have a solid foundation, you can have a whole inventory of miners and equip an infinite amount of them (In the video I didn't click at all! I had 3 miners equipped), but if I want to add some sort of progression to the game I might want to limit the amount you equip and increase that amount through upgrades.

As for the ores, I plan for unique visuals. The image of the ore will be made through pixel art, but I'll merge it with vector art by applying gradients which make it look like it blends/shines.

The game currently lacks visuals, ores, areas, and other ideas I might want to add, but I have big plans!

Quick edit: Ore inventories are already in the game, they just lack use or visualization