Twitter is probably the best and easiest way to share progress and be more engaged with game jams. Could you add a hashtag that we can use for the jam, itch.io allows you to set one on the jam page. Just #MinimalisticJam would be great. :)
I've been in much smaller jams that had a good Twitter presence. You don't have to use it personally, but for those of us that do use Twitter you need to have it on the page otherwise we can't engage because there's no common hashtag. People will be sharing stuff on Twitter anyway, the hashtag will just let other participants know where to look to see it. >.<