I think the miners overalls should change color according to the highest tier ore you have Example: the highest ore you can mine is cobalt you'd have blue overalls.
Can someone give me the name of the end song I don't feel like going through the game again just for a song + Maybe add a diamond cost to go against the boss again with multiple bosses.
 "Woodclicker"){kind=icon}
It's The Final Phase by darkmetroidomega on Newgrounds, here's a link: http://www.newgrounds.com/audio/listen/616845