I want to upgrade my tools but I don't know where I can find copper ore.
I'm level 5 mining and I've started finding it level 5 in the mine. I haven't found it earlier than that.
Is it appear on any floor?
Copper starts appearing from lvl 4 and beyond, states the developer in a steam thread.
Starts appearing while mining after about floor 5, an easier way to get 1 copper is to go to the bottom left of the map where there is a chest with 1 copper in it.
What do you think?