Next Fest demo recommendation: Pipistrello and the Cursed Yoyo.
It's an overhead view action/adventure game where the core mechanic is a yoyo that can be repeatedly bounced across angled surfaces. It reminds me of Drill Dozer in that it has sort of one core mechanic, but keeps finding new and clever things to do with that one mechanic. Everything about it feels great; I'm already excited just from the demo.