Steam Next Fest is a week-long celebration featuring hundreds of FREE playable demos as well as developer livestreams and chats. Players try out upcoming games on Steam pre-release, developers gather feedback and build an audience ahead of their Steam launch, everyone wins!
Check out the game A Musical Story. It’s ostensibly a rhythm game, but I don’t think there is a failure condition other than that you have to keep trying the music loop until you clear it to get to the next vignette. It’s sort of a wordless short story told through animated slides and deeply groovy musical interludes