I’ve waited 4 months to use this image.
My theory:
It’s a video game.
well i mean, the connections to mother are because Toby based the game on it, made mods for it, and his returning song “Megalovania” was originally in one of those mods. so, not as far fetched as some would think.
That reminds me of high school English class where the teacher would say everything is symbolism and a metaphor. I’m aware they’re just theories, but most of the time, it’s just been loose connections based on very few common factors.
“It looks and sounds like this, therefore it’s that.”
But it’s more likely that sans was gasters assistant which would explain the strange machine, the strange blueprints and the time and space thing