What do you use to run them locally? FLASH doesn't exist anymore and all the emulators do not properly work. I've got an archive of FLASH games myself, but I cannot play them anymore.
Flash Player in the browser doesn't exist anymore. There's still the standalone Flash Player that game with Adobe Flash/Animate, and it works fine. It doesn't depend on browser compatibility, since it runs on its own.
Not a thing on Linux as far as I know, unfortunately.