It's delightful and I like seeing the art and gameplay demos. One thing about the demo, though, is that the speed level cranks up way too quickly for me, such that if I'm playing okay, I get to speed level 5, and the pauses are too short to find other matches, and then I've gone from starting the game to game over within a couple of minutes. If that's what you were aiming for, then it works well, but if you wanted someone to be able to play the demo for a little longer before it all came crashing down, the speed increases might need some tweaking.
(Or maybe I'm just not good at these kinds of games, but I'd really like to be able to play this game without having to deal with "git gud" as a design feature.)
I still plan on backing , though, because I want to see this game come into the world.