great idea. i used a lot of unity assets because i was focused on speed. but i like the rule of only allowing engines and libraries and everything else has to be made by the participants. i also like the solo rule but there's no way to enforce it :)
i'm assuming in order to participate all you have to do is follow the rules and include a certain tag? instead of an event you could create the new tag steemitjam and simply let people share 24~48hour projects any time they want.
Interesting point, I think #gamedevdaily or #gamejamdaily would be better suited for such projects. I intended to use the tag #steemitjam for the jam's entries.