All art is a form of communication. People putting out an abstract message that viewers will need to take the task of understanding. "Moon" makes the player do this through gamifying the desire to understand people. But in the end, it is only a game. You can only apply so much life and desire to code. So, the only way to win a game about understanding other people is to go out and do it in real life.
Lovedelic making a game just to say "go outside":
"Moon" is such a unique experience. It's one of the least stressful games I've played whilst also feeling like it has a lot of depth to it's game play and what you are actually doing. I can point to handful of games that do this or that which is similar, but they aren't Moon. Moon is kinda a game that didn't want to sit with game play conventions and just wanted the player to explore it's world and enjoy themself.