As cute as the concept and the hand animations are, it feels weird that as a concept game, there isn't any audio/video response for hitting notes besides the arrows disappearing. I would even argue that it’s very crucial for rhythmic games to have strong input feedback. A "snap" sound, a burst of particles, or both... it can take any from but there just has to be more responses.
IMO rhythm games shouldn't just be the player listening to the music while hitting the falling notes as if the music is merely a background. It's the input responses that makes the player actually feel participated in the playing of the music. It is not just about hitting buttons at the right time while the music is playing in the background, making the player groove with the beats made by themselves is the key to a satisfying experience.
But then it would be another story if the point of the game is meant to be humorous about how the dog being forced to dance in the arcade felt.