If you're going to watch this for the 80s aesthetic then you're going to be disappointed. It must have been filmed in 1979 and then released in 1980. It's very much a 70s movie. Disco music, electric lights, glitter dresses, bob haircuts. The dance floor at the prom looks like the one from Saturday Night Fever, all lit up.
Style aside, it wasn't a terrible movie but it wasn't great either. Just your typical slasher.