Hollywood Hijinx is not one of Infocom's best games on any of several counts: the setting is comparatively mundane, the puzzles are mostly very implausible, and the plot is thin. It's also considerably shorter to play than some of the old standards.
Despite all of which, it remains a solidly entertaining entry in the basic genre of Treasure Hunt in a Relative's Weird, Puzzle-trapped House. (See also: Finding Martin, Letters from Home, The Mulldoon Legacy, Mystery House, etc.) There are a couple of very ingenious set piece puzzles that are worth playing the game for all by themselves; and the tone is upbeat and engaging throughout.