Bummer dude, like yeah we all knew it was gonna happen, and I was one of the early birds to warn everyone about the killswitch and Newgrounds Player probably not working. With that said, Zone-tan 1 and Zone-tan 2 works fine on Ruffle emulation, the only problem I've seen so far is that dynamic text like in the percentage bar on Zone-tan 2 doesn't work, and of course everything is loaded behind the scenes so you will no longer see the preloader. As for YCH Project and Natsume vs Killer Klowns, well they run on AS3 and will completely flip out if you attempt to run it with Ruffle.
I will release .exe updates for YCH on the itch.io for the final few updates before ending that chapter of my life:
For Natsume vs Killer Klowns, I'll wait for Natty to come back, as well as DrThallium to get settled down, so that I can implement voices and music. When that is done, I'll also make an exe which I will put as a side download in the ych itch.io
Then I'll probably take a break to figure out what I want to do with my life, maybe learn something new along the way. Remember to always be channeling your Love, your Anger and all of your Sorrow, into your fire breathing fists and forge greatness with your flames.