He writes in the description about what he was going for as far as making it seem like part of the actual game while still referencing their romantic history, and how well it worked (good for them!).
That's me! I made that 17 years ago, still happily married. Took me like two weeks of full time tinkering. It involved a lot of trial and error messing with a hex editor.
https://www.youtube.com/watch?v=7_HMLvLB7b0 "I proposed by hacking Chrono Trigger (Oct 24, 2008, 6m 57s)"
He writes in the description about what he was going for as far as making it seem like part of the actual game while still referencing their romantic history, and how well it worked (good for them!).