Hello!
We launched the Frontier Paladin demo publicly during the Steam Tower Defense Fest last week. It's been up for 8 days, and during those days we got plenty of good feedback. I hope everyone who played it enjoyed it!
We've just taken the demo down while we work on continuing to add features, fix bugs, improve optimization etc.
We're going to be in a few more festivals over the next few months, though we don't necessarily plan on only keeping the demo public during those times. At this point, the very latest the demo will be up again is in one month's time, in early September.