While it’s not the game of the film, which would have been one long tutorial, it still manages to be just as bad as most film licenses. Perhaps the game’s shortness is a blessing in disguise.
The short answer to the question, "Why isn't Jericho a fun game to play?" is that the AI is broken and the hackneyed horror stylings would barely have raised an eyebrow back in Barker's '80s heyday.