At 94 minutes, it's a criminally brief and superficial look at the hidden wizardry of movie scores. While I acknowledge how underfinanced documentaries typically are, this subject could use at least another hour of runtime and score forensics.
One significant aspect of a movie composer's job is, or at least for decades had been, the remote, hermit-like nature of composing a score to match what is a living, changing, typically subject-to-ongoing-editing filmed material. "Score" barely even brushes upon that, leaning towards the portrayal of a composer's job as glamorously mysterious.
But still, beautifully made and definitely brings emotions out right from the first scene.