1) The whole movie feels like it was shot much later than 1966. Amazing picture.
2) What was that? What am I supposed to do with that?
Here are a few thoughts that remain after watching. Contemplative film for those who love visual art. If you're waiting for a classic thriller or a detective, be careful, this movie might freak you out. Not only a special pitch, but just a plot. I don't know what to compare it to.
At the end, you'll have a demonstrative metaphor. A scene that says to the viewer, "It's a code, and that explains it." But I haven't figured something out, and I'll look for a ready-made analysis.