Yeah, agreed...the character style would clash quite a bit, i think the only game with compatible character sprites would be some from Undercover Cops (Which some levels are featured in your game

That's pretty awesome tho, i'll be happy to see some of the hook graphics in there ;D
If there is a spriter out there willing to make them more akin to the sailor moon arcade graphics, this game has a park level: https://www.youtube.com/watch?v=CxvEEs_f3TY
However, as it is...it's a bit underwhelming, there's not much detail, it'd probably stick out.
There are some other games that feature park stages (like "Combatribes", "Ninja Combat"), but again, the style's not really fitting...
And the first stage in this one reminded me of tokyo tower a bit, kind of:
https://www.youtube.com/watch?v=QeqBSQcNNF4