This is a fun movie for Jane Levy fans. Otherwise I can see how others may get up and leave, like my wife did after about 25 minutes. We watched it on Amazon streaming movies.
Levy is Stepphy Holliday, a small town Canadian girl who aspires to singing and/or acting fame. She does her own singing for a number of songs and even though she is just a passable singer it sort of fits the time period, 1963, when many of the popular female singers were just "passable" but became popular. I was 18 in 1963, I remember it well.
Anyway the gimmick here is a local chemical plant has an operational upset, a purple haze permeates the area, locals begin to develop an assortment of abnormalities, usually a growth where one doesn't belong. After seeing the movie it is not clear to me why the purple haze was necessary, the story develops along an unusual path and when it was over I thought "so what!"
I like Jane Levy, she is very entertaining in her role, had it not been for her I would not have enjoyed this very quirky and unusual movie. My rating is "5".