Maybe the fact it's trees in the background and bushes in the foreground? But it could just be a different part of the park, different design and landscaping.
The only other thing that occurred to me is that it's unusual to see bare soil in a park, but with the way you've designed it an alternative wouldn't really be feasible, and it stopped bothering me once I'd resolved that.
I like the fountain from page 8 but it could be more... dynamic. If the stone god was sleeping (think images of Homer sleeping in 'The Simpsons', made to look really lazy and gross, dropping things from his hands right off of the shrine, drool down his face, even - nay, especially - dressed only in underwear) and the gold god was seriously obese (more than a fat belly, but fat arms, fat legs, fat face, fat neck) and actively depicted stuffing his face with food (gross, messy overeating) it would make the themes more obvious and give it much more impact, funnier and weirder and cooler. Hyperbole is a great communicator, and very entertaining.
But it would probably a lot harder to draw, if nothing else.
I was also thinking that rubbish left lying around the fountain would emphasise its themes as well (eat like a glutton and discard without effort) but then, could there be rubbish scattered throughout the whole park? This could even be an offering to the gods!