First off, I think the movie works best as a scathing indictment about the way we consume art. An especially dick move given how nearly everyone (myself included) was sucked into viewing the film as some kind of set of potential keys to the shining. The weird banal moments that get tossed in (Fell Ryan's baby crying for example) do a fantastic job of individuating this pop-compulsion that so many of us have to impose extrinsic theory on art. Sure, the characters here were obviously absurd extremes, but that didn't lessen the impact of what I think was a near-perfect attack on our frequent failure to engage art on its own terms. The Shining is the perfect film to explore this concept because of Kubrick's uncanny ability to create films that are damn near perfect (and at their best) when viewed as completely self-sufficient. This tension between a film that has impeccable internal logic of its own and our constant desire to bring subjective experience in as some key part of the viewing experience was perfect. I think this is probably the best film about film theory (armchair or otherwise) that I've ever seen.
In no way is the movie parody.