Unforutnately at the moment, the cursor is rendered via PIXI.JS( the game renderer ), inside the games renderer.
So basically any extra Image or Canvas objects that are placed OVER the games renderer will take priority.
I do have a plan to resolve this issue however I have several other projects that must take priority.
I have lots of plans still in store for the plugin unfortunately my time pretty short these days. However I WILL get to this hopefully sooner rather than later.