Scene Design

So, I have many ideas for scenes (like an urban/dystopian Alice in Wonderland or Japanese garden) but I have narrowed it down to something simple and beautiful. I want to make a ghost so freaking bad, so I have this depressed ghost sitting in the middle of a pond over a relic of some sort. An adventurer will be standing at the edge staring at her. There will be willow trees and fireflies and assortments of other flora/fauna. They will have a Wind Waker cartoony style to them and will be animated and interact. My bonus idea if I have time is to have a sort of choose your own adventure theme where the adventurer will be confronted by a series of questions and the answers give different results. I think it would be fun. Here are a couple of sketches/paintings of said scene. The painting captures the color pallet I would like to use (very blue and cold).