How Are High Scores Tracked on Older Flash Games?

Hey all,
I've recently been revisiting some of the classic Flash games on Kongregate (thanks to Ruffle and other emulators keeping them alive), and I’m curious—how exactly were high scores tracked back in the day? Were they stored server-side by Kongregate, or was it all handled through the game’s code?

Also, does anyone know if it's still possible to submit scores or earn badges on older games now that Flash is discontinued? I'd love to keep progressing through the badge system but not sure what's still functional.

Would appreciate any insight from longtime users or devs who’ve worked with Kong’s API!

golf hit