http://www.quiltingboard.com/virtual_section_list.jsp
If you read the Topic List heading for these types of quilt, you'll find a definition. The term 'Stack n Whack' is Bethany Reynold's trademark so can technically only be applied to her designs. OBW or One Block Wonder is a term used by Maxine Rosenthal in her books to described kaleidoscope quilts made only of either hexagons (6 equilateral triangles) or octogans (8 isoceles triangles each of 45 degrees) set edge to edge with NO sashing or setting solid fabric of any kind.
Since yours is from a kit, I'd say it was a kaleidoscope, you could also call it 'stacked' stars. But I'd also call it 'beautiful'! :-D