I reckon only an eejit could say this about Punch and Judy:
The music, while never atonal, is bleak and without tunes
The following is actually the case:
"The music, which is almost always atonal, is vibrant and frequently tuneful."
Thank you, Stuart.
I am unable to recognise a key when I hear it, but I had assumed there were none in the score. I found I could hum and recognise tunes and motifs easily enough. Since all Punch's victims, except the baby (a rather big exception) are joining in after their murders, I don't think we are meant to take the murders literally.
In the Young Vic prod the victims all removed their slap after their murders, thus becoming recognizable humans. And I liked the way that when celebrating the union of Punch and Polly, Judy was wearing a hat, as is proper at weddings.