A passage early on shows a child playing with a zoetrope (a pre-camera gadget for simple animations). That foreshadows a wide variety of techniques in this imaginative film, including live action, stop animation, hand-drawn cel animation, and combinations of any two or three. Stop animation evokes Svankmajer's use live actors as animation puppets, as well as use of food. Some macabre, skeletal puppets also bring the Brothers Quay to mind. None of that implies that Leiser's style is at all derivative, however - every scene carries his distinctive imprint, including dramatic imagery around a major, catastrophic incident.
After the technique, Leiser's content seems much harder to capture. I found it easy to dislike the ineffectual psychiatrist and to feel for the desperate mother. The twins, however, remained enigmatic to me. They lived as a symbiotic pair in a world governed by beings with huge powers. Neither the nature of their bond nor the rules of that world ever came clear, however. I don't need to understand every part of a pattern in a movie or the reason for it, but I look to see that there is some pattern somewhere. This time, not enough parts came together for me to perceive that any unified whole existed at all.
When logical structure in a movie eludes me, whether or not I understand that structure, I look to the visuals to pull me along. Although strong, this movie's imagery didn't have quite the power that others do. Fans of surrealist animation will find a fair bit to enjoy here, but I can't say it's a must-have for any personal library.