So I played this several days ago, but I am only today rating and leaving a comment. Now my memory of it has been staled by dozens of other holojam entries. Perhaps that's unfair to you developer, and for that I am sorry.
I just remember watching on as my sister struggled to stab on onslaught of boops. There doesn't seem to be any penalty for swinging and missing, which seems important for a rhythm game.
The dialogue between the characters was pretty light, I remember jokes but not what they were. Actually, the whole thing is pretty ironic considering that this game was about Gura losing her memories. Maybe the game is really good then.
But I don't remember...