This one screams a glorious low budget and if Mystery Science Theater 3000 hadn't done a version of it I'd have been seriously surprised. Of course they did, and considered it the worst film they'd seen up until that time. Manos: The Hands of Fate came later. Made in 1965 in black and white, it has bad acting, bad dialogue and bad music. It also has bad sound and bad lighting so it's often hard to tell exactly what's going on, even with a clear narration. Then again that may be a blessing. There's literally nothing good about this film: not only is it bad but it's boring. Bad is understandable in a film like this for many reasons, boring isn't.
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on DVD To be fair the main reason that it's so bad is that it's really two films. Director Bill Rebane ran out of funding on his film Terror at Halfday in 1961 and couldn't finish it. It would have disappeared without a trace had Herschell Gordon Lewis not needed a second film to play alongside his Moonshine Mountain three years later. He bought the footage, shot some additional scenes to finish it off (with new actors given that the originals weren't available) and added a narration and a new title. He was so proud of the results that he didn't even put his name on them: he's uncredited as a director and listed under the pseudonym of Sheldon S Seymour for his additional dialogue.