Labyrinth

Labyrinth was an adventure game by Lucasfilm Games. It did not use the SCUMM language created by Ron Gilbert, as Maniac Mansion was the first game by the company to utilize that. However, it was its first graphical adventure game. You can choose to play as a boy or as a girl. 

You are watching the movie Labyrinth, the Lucasfilm and Jim Henson co-production this game is based on. Soon, you are sucked into the titular labyrinth through the movie screen. 

The game starts out as a text adventure, but once you get to the movie theater, it turns into a graphic adventure. The game designers wanted it to be the gaming parallel to The Wizard of Oz switching from black and white to color once Dorothy reached Oz.