As Seth, dig a tunnel downward to reach the cavern below. Collect as many fossils and gems as you can. A star rating meter at the top of the screen shows your level rating with your given progress. Avoid hitting any obstacles, either from above or from the sides. You can only move down, left, and right. Collecting fossils and gems. Each collectible you acquire increases your star rating. To get a three star rating, you must collect all the items in a level. The top row bar shows you how close you are to earning a higher star rating.