Flash has been around for quite a while. Newer versions of it just won't run older files reliably, so any kinda Flash player could sure use legacy buttons... and not like the ones Windows uses (which rarely work), since it's all emulated crap anyway
Also and for the record, I've got a little over 10 GB (almost 4,000 files) of old NG flash animations/games hoarded away, back from a time I didn't have any internet at home, and would burn a CD or load a thumb drive from a relative's house on the weekends. Problem is, the filenames don't always match the title of the submission, but with a little luck...
(bringing this up, because I've heard certain submissions were pulled, never to be seen again, even by their own authors!)
Vault 101 I have many old and deleted Flash submissions, PM me the filename, maybe I got it.
If I'm not here, you can find me racing on GTA: Online, gamertag: VicariousE