In each level, you're presented with a field of different shapes such as pentagons, circles, and triangles, and a whole bunch of red stars. By clicking and holding on the other shapes, you expand their edges to capture stars. So clicking and holding on a circle makes an ever-increasing circle, and the same with the other shapes. The goal is to clear all the stars on the level. The catch is that you can't have any shapes overlapping each other, and you can only use each shape once. To maximize your score, try to capture the shooting stars that randomly float through the level, and complete the board as quickly as possible for a time bonus.
With its tinkling music box soundtrack and simple design, Asterisk is easy on the eyes and ears. Since there are only 20 levels, this is more of a Zen, stress-relieving coffee break game than something meaty to really get your puzzling hooks into, but sometimes that's exactly what you're looking for.