Really cool educational bit, and that's a sick fun fact! Gameplay wise I feel as though the clicker segment and testing segment are kind of separated. You click until you get enough money to never click again, and then you test the rocket engine enough until you hit the golden mixture. It'd be cool if something brought you back to the clicking phase like you need to test engines to get each printer or something. Not exactly sure. Overall though, super sick, and I learned something cool! Nice job :D