When I saw this in a theater in 1982, a woman screamed and ran out of the theater following a particularly gory off-the-screen gimmick effect. I didn't see what bothered her so much. It's a fun exploitation film with deep 3-D and some good gimmicks. I bet Demi Moore leaves it off her resume these days.
Director Charles Band did three additional 3-D features over the years: Metalstorm (1983), which is on Blu-ray 3D; The Creeps (1997); released on DVD in field sequential but flat on blu-ray (boo) and more recently, Evil Bong 3-D, which seems to have only received an anaglyphic DVD release.