Finders Keepers (1991)

Ten year-old Patrick is a computer whiz. One day, through a computer game at the local shop, he receives a bizarre invitation to become a contestant on a million dollar game show. But the TV channel and the game don't exist-or do they? Patrick accepts the invitation and so begins a series of journeys across the time barrier into a new dimension full of strange characters, baffling encounters and the ever-present danger of fading away before returning to his own world. Based on the book Finders Keepers by Emily Rodda.