Thank you for the feedback. I doubled the amount of ores now. Maybe in the future I could make it so that going further from the center gives you better ores.
I just finished playing for 1h, and I feel like the income is still very small. The issue isn't even ore drop rate, but more so that I'm not seeing any improvement in my average income per full equipment.
Maybe consider implementing a way to intentionally find better ores, like an ore compass?
Great game!