I know its quite literally only minutes old, but your steam page for the demo doesn't actually have a demo on it. At least for me, anyway. Just wanted to let you know here in case you see this before you realize there may be an issue for some folks on your steam page. Checked on my Pc, phone and my steam deck, none of which actually had the demo available on the page. Could be just me. Could be it just hasn't actually posted yet. Wanted to let you know.
All that said, this looks incredibly fun and I can't wait to play it.