Ah I hardly watch any Adult Swim or David Firth stuff so I wonder if that had a impact.
I do have a few criticisms, while I did like that they chucked a loads of ideas in, I wished it had been more put together, something in the vein of Pulp Fiction or Boogie Nights, where the characters are in someway connect together or connect to the setting. The film is set around a earthquake in LA but never seems clear that all the character have been affected by it, at least two of the character only mention it in passing and one whole story arch never mentions it at all. Also (And maybe they couldn't do this for budget reasons)I would have loved to see more of LA, we get a glimpse of it when the Asian lady escapes and sees the flying turkeys but apart from that most of the film seems spent indoors.
Still I ''enjoyed'' my time with the film, as you said the soundtrack is great(Flying Lotus ambient stuff is very underrated), for such a gross film it was a times beautifully shot - some of the parts in the forrest where especially nice(I think there was a reference to Tarkovsky in some of the water shots.) and the complete gross out horror similar to the Evil Dead 2 was nice to see as well.
Overall I would be interested to see why Flying Lotus does next.