My problem is that I have found way too many demos I like. The backlog will just keep on growing and growing.

Best highlights were: Orbyss, Hirogami (similar to Okami but with origami forms), Holstin, Tamashika (like Post Void but better), UVSU, Rue Valley (in a Disco Elysium style with a time loop), Ooo, Dead as Disco.
Others that were pretty fun: Morbid Metal, Tormented Souls 2, Kaizen: Factory Story.