This is a really fascinating game simply for how vulnerable it makes the player feel. In a medium riddled with power fantasies, You Must be 18 or Older to Enter stands out by undoubtedly making the player uncomfortable.
I caught myself turning down my computer's volume while playing out of embarrassment, and laughing deflectively at the 18+ sounds while feeling red in the cheeks.
And a special shoutout to Julie Buchanan, who was brave enough to tackle the audio for this project. It was very effective!