Stars

You get Stars when you discover a Sediment or Rock or when you detonate a certain number of rocks or set down a piece of Automation. There is a thing that you need to detonate 65 Rocks to get. To find 65 Rocks dig down about 200 Sediments at the same level as the Elevator you are given as a gift. When you find it kick a Rock and run away and kaboom and you get a bunch of Stars and Gold Dust. Stars can be used to upgrade and get certificates and stuff.