Neat, but Ruffle failed to load the first game I tried, with reasoning that there is possibly no file to load.

And then I was blocked by Cloudflare, even though there were no Cloudflare scripts to enable (checking in an alternate browser).

edit: It looks like uBlock origin sees the cloudflare scripts, but NoScript does not (and did not display 3 scripts) initially. I'll have to try again later.