From Bindweed Entertainment Software:
Volcano is a new puzzle game in which you have to push colored rocks to form lines of three, which disappear. Rocks are pushed up from the bottom of the volcano, forming a pile. Let them build too high and the volcano will erupt. Features include embedded gems and special powers you can access as your score increases. Excellent graphics and a rocking soundtrack complete the picture. Play in Puzzle mode or against the clock, or with a balanced combination of the two.