Starball is both simple in presentation and game mechanics. The object is to roll your green ball around the rectangular board and collect the stars that randomly pop up. Each star collected adds a point to your score, as well as adding a tiny red hazardous ball that bounces back and forth either horizontally or vertically. There is only one star available at a time and each new star brings a new red ball into play. Power-ups in the form of a question mark also appear randomly, offering several temporary benefits.