That's very relatable. I don't really have any specific project I could mention that would make anyone's jaw drop. But if I look back at how little I knew compared to now, and the fact that I completely self-taught myself everything, I did some insane stuff for my age. I was so determined and could lose myself for weeks into a project just because I was so positively driven. I could do the same stuff now, much better too. But I wouldn't have the same drive and inspiration to come up with something and build it to perfection.

One thing that comes to mind is a bot I made that played bejeweled blitz. It worked by taking screenshots and calculated the optimal move, and moved the mouse to make those moves. I was 13 and wrote it in VB6.