a good idea would be to in hard to find things like yes because there small nugget but more like worms worth 100000 just beacuse there small and sometimes still also i think that you should put in things like if you are unactive for a while the game will have the workers take a break so you cant get to copper over night
 "Sticky Idle Digger"){kind=icon}
 "The Enchanted Cave 2"){kind=icon}