These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Humans Are the Real Monsters: This is one possible interpretation of when Peter finds a woman in the dungeons of medieval world near the end of the film. He initially believes her to be a fellow guest left chained up when the robots ran amok either as part of a capture-and-escape fantasy like the jailbreak in Western World, or else maybe as some kind of kinky bondage game. Then he finds out she's a robot when a drink of water shorts her out. If one thinks the implication is that she was probably chained up as part of some sicko human's torture and rape fantasy left uncompleted when the robots revolted, then it is this trope. But if one believes she was actually placed there as part of the authenticity of the world, it is not.
Older Than They Think: Osamu Tezuka actually came up with a very similar premise over a decade earlier for an episode of Astro Boy entitled Robotland. Not only that, the aesthetic of the park is suspiciously similar to the "Murder Game Room" from the late 1960s Sankei Newspaper Astro Boy serial, right down to the cowboy costumes. Tezuka himself points out the similarities in his introduction to the trade paperback in which the Robotland story appears, where he dismisses it as mere coincidence rather than a deliberate ripoff.
Paranoia Fuel: You'll think twice before taking a vacation in a great park like this one from here on in.