It's an open-source archive that can run on both Windows and Linux
(it's a bit trickier to run on Linux but I've personally confirmed it works to an extent in an Arch Linux VM (some OpenGL/WebGL games are unrunable so a Windows VM is required for some HTML games)
I will have to check this out on my computer; there were some legitimately good Flash games over the years. Hello Worlds! is one and I see it listed on this website.
That's really cool, thanks for sharing. Delighted to find that they have the Flash version of Portal, which I discovered long before I played the real game!
no worries and yeah the OG Portal game is def fun🤗
I remember playing it before Valve's version came out and thinking they made a quite a fun and interesting improvement to the original concept/mechanic!