It's been a while since I've seen this film, so this review is just the general impressions that it left and that I still remember, instead of something more definitive in regards to the plot and the characters. But that's really OK because you aren't watching this movie for a strong plot, or even characters that you can really understand and relate too, because that's all secondary. The real reason to watch this movie is the luscious animation, intelligent direction, and sound and effects that boggle the mind. It's a fun romp into the human subconscious that never really gets too deep. Many questions are left unanswered, and there are plot holes so big that it would take an entire new movie to explain. To its benefit, most of those are really only after thoughts, and they are lost in the experience of actually watching this movie. It sucks you in with it's inventive style from the quirky and witty opening sequence to the bizarre and psychedelic end.
If you like your movies with a stronger plot, and a sequence of events that make sense, then you might not like this film. If you are open to the idea that a film like this could be a spectacle of pop art, or enjoy sophistry masquerading as deep philosophical insight, then this is a film you can sink your teeth into. Personally, the pop art aspect of this movie is what really appealed to me. Style and wit over true substance, a feast for the eyes and ears, candy for the soul. Tremendous fun, but a bit empty and too light to really take anything away.