This stands out conceptually as one of the best stories I've ever read, if not the very best. It has that unmistakable signature of the creator of the truly unique movies Primer and Upstream Color, favorites of mine, showcasing the same masterful use of complex and mind-blowing ideas, unconventional narrative structure, and closed-world setting.
I would describe A Topiary as 80s Spielberg meets HP Lovecraft and Stephen King, with a side of Jorge Luis Borges. Yes, it is an outlandish mix of all that, and more. It is the story of two groups of people (adults in the 80s an kids decades later) trying to solve an enigma shaped by a cosmic logic they don't understand, and the consequences of the endeavor. I'll leave it at that.
Although this is a script which mainly focuses on the ideas and action, it still overflows with pathos and deep humanity, especially within the children's story. The dialogue leaves a lot to the imagination, and the emphasis is on the unsaid. It felt like being thrown in a room with a bunch of people and little context about the situation... it might sound counter-productive and annoying, but in this case, I enjoyed it.
The main power of this story is that it ignites your imagination. It is rich in bizarre and wonderful imagery that made stop reading, close my eyes, and try to picture what was on the page. That is a gift.
I am saddened that this movie never saw the light of day. It had the potential to be an exceptional cinematic experience, one which I'm sure would could have been a cultural phenomenon. Oh well.