You have the 700 games extracted to a folder, but double-clicking them does nothing. You need a "Flash Player Projector." Adobe no longer offers this directly, but the community has preserved it.
packs can be risky. If you are looking for a massive collection, the community-standard recommendation is the Flashpoint Archive 700 flash games pack download
"700 Flash Games Pack" is a classic software compilation for Windows, originally released around December 2004 You have the 700 games extracted to a