I think this is an interesting idea, but your jam page is pretty much empty and doesn’t look like any effort was put into it. I think it would help to get people to join if you filled it out a bit more.

There's a problem though - games made in GameMaker versions prior to GameMaker Studio won't run on Windows 8 or Windows 10 - they crash.  You might find the same problem with the other game engines as well.  (I don't know if you can overcome that with compatibility settings,   you'd have to test that first.)