They really only hinted at the Sixers farming the keys, but did have one of the funniest parts of the movie when they showed the lot of them trying to get the Shining key.
I really think they both tell the story and are both excellent in their own elements. The 2nd key to me was the highlight of the movie, even though I remember way back when getting the dot and unlocking the secret message in Adventure. BTW, I haven't played in years, but isn't the dot in the wrong place in the movie? I remember needing the bridge to get into that squared off section and then grabbing it in the lower left hand corner of the screen.
The other Atari easter eggs were cool in Missile Command and Yars Revenge back in the day when you had to wait for the next month's issue of Atari Age instead of looking up online how to see these codes.