A cool idea. I liked the clean aesthetic. The sound was good for the most part, but there was a quite harsh click noise when you went past the nodes.
My main critique would be the "level design". Some of the nodes seemed impossible to accurately tap, they were simple too close together to react to, this was most evident on the sword. Something more rhythmic or that followed consistent patterns would go a long way, as the nodes essentially felt random in their placement. Despite mapping out images.
It was a cool idea though, and you executed well on that idea. Nice one!