“Pearl is a certifiable engineering genius... but that doesn't mean a spaceship made from parts found in an old barn is going to last long enough to even escape Earth's atmosphere.” TV Tropes
For a deeper look into the history and themes of real-world space competition that inspired titles like this, check out this breakdown:
: This episode provides a poignant look at Pearl’s isolation on Earth. Her "Serious Business" attitude toward the project stems from a desperate need to reconnect with the Gem world she left behind.
: The use of a "surprisingly realistic outcome"—building a ship from barn scraps—serves as a metaphor for the Gems' current state: making do with Earthly remnants while dreaming of something greater.