This popped up on my YouTube, because I like older movies. I knew nothing about the plot before watching it. This movie is fine if you have insomnia and are trying...to go...to sleep...!
It was mildly interesting for the first 15 minutes or so, but the characters were almost caricatures of themselves. One-dimensional. Very little drama, although there were some interesting camera angles of the tower which threatened vertigo.
However, when one of the characters, Joshua--apparently not playing with a full deck--advised the drifter (John Ericson), "Get out now, while you still can!!", I took his advice, and bailed out of the movie right then and there. Good advice-- saved me some time!