There should be some indication of what level is needed to mine which ore. Also, there doesn't seem to be any use in the old ones accumulated and you can't do shit with it =/
The energy function doesn't seem useful in this game. Maybe to make it challenging, the energy drains faster? I've noticed the AI needing more energy than me.
Otherwise, the music, cuteness, and game play is superb.
 "Frozen Islands"){kind=icon}
 "Woodclicker"){kind=icon}
 "Idle Mine EX 2"){kind=icon}
 "Dragmanards"){kind=icon}
 "BioGems"){kind=icon}