The fact that there are stronger more valuable versions of what you mine before you get to the treasure is really cool and useful. And those pickaxe designs are really on top, but another thing with them is that each pickaxe part has its own unique buff. I've started playing this since I was only in 5th grade, and its awesome to play it again. I love it.
 "MineQuest"){kind=icon}
 "Time Clickers"){kind=icon}