Torin's Passage is a graphic adventure game developed and released by Sierra On-Line, designed by Al Lowe. The game holds the distinction of being a family friendly game by Lowe, designer of the adult-oriented Leisure Suit Larry series of games.
The protagonist of the game is Torin, the son of a farming family on the planet of Strata. An evil sorceress named Lycentia captures his family with a magic spell and he embarks on a quest to find her and free his parents. He travels to the "lands below" to worlds beneath the surface of the nested planet, through colossus crystal columns called phenocrysts. These phenocrysts transfer life-giving sunlight to the lower worlds and people too with "Aerodski" powder. He is aided by a purple cat-like creature called Boogle, who is able to change itself into a variety of shapes.
Source: Wikipedia, "Torin's Passage", available under the CC-BY-SA License.