Toonstruck

Toonstruck is a point-and-click adventure game where the player controls Christopher Lloyd's digitized likeness. He is mysteriously drawn into the television screen and transported to an idyllic two-dimensional cartoon world populated by his own creations and discovers that this fictional paradise is being ravaged by a ruthless new character with a devastating weapon that mutates the pleasant, childish landscape and its inhabitants into dark, twisted versions of themselves. (wikipedia.org).