Kind of off topic, but Marble Madness was a large part of what inspired me to start programming. My dad played it when he was a kid and it made an impression on him, so he had me play it on MAME as a kid. I was blown away by the fact that computers can simulate (fairly complex) falling objects in an isometric space, but I couldn't figure out for the life of me how to reproduce that in Game Maker 7 at the time. When I got better at math, it influenced a project in my teens that's on my resume to this day.