I honestly have no idea when I stumbled upon it but I remember my childhood was very largely full of flash content,

the first video game I ever played was Super Mario Bros on the NES but I vaguely remember somehow the console broke or something, so I spent a lot of my childhood playing flash games on various sites not just NG and someday stumbled across things like Madness Combat and Pico among other things like 53xy83457 I do not remember much else but I do remember I stumbled across those two series as a kid.