Newgrounds apparently does still have their Flash games up and they actually basically just wrote a Flash wrapper that takes "newgroundsplayer:" URLs and loads them off their website.
I wrote a quick lil VB.NET application that'll let you take those URLs and download the games instead.
It looks fake lol but it works!
90% of it is just StackOverflow code that I got for JSON parsing and whatnot but I did actually do the digging to find the URL prefix for the JSON files lol
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko