Offline Flash players for Linux and Windows
You can get the standalone program to play Flash games offline on Linux (64-bit) here:
https://askubuntu.com/questions/955724/how-do-i-play-swf-games-on-ubuntu#answers
Or on Windows here:
https://gitlab.com/cleanflash/installer/-/releases
Ruffle saves websites. Even Kongregate uses it!
If you're looking to resurrect the flash embedded in webpages, https://ruffle.rs/ can be a drop-in replacement for flash player. It works for ytmnd toys, visual novels, comic books, it aint perfect (it's a flash emulator, not a flash clone) but it could keep your dumbass form-entry stuff alive.
Different sites have their own ways of preserving Flash games:
The Ninja Kiwi Archive
https://ninjakiwi.com/archive
https://store.steampowered.com/app/1275350/Ninja_Kiwi_Archive/
Newgrounds Flash Player
https://www.newgrounds.com/flash/player
FlashArch.com
FlashArch.com is a site containing uploaded flash games.
If you can't find it anywhere else, you're likely to find old flash games that you're looking for there.
https://flasharch.com/
The Armor Games archive
Use the "Offline Flash players" section above to download an offline Flash player.
Then download the games you want from this archive:
https://archive.org/details/armorgames
Not all the games work! It might be because some of them demand an internet connection for multiplayer play? Just a guess.
Have Ruffle? Play games now!
Bejeweled 2
Motherload
Smashing
https://armorgames.com/play/376/smashing
Clash 'n Slash
https://www.newgrounds.com/portal/view/248927