Hi there,
Before reading, I want you to know that you can test my little code here : https://jsfiddle.net/TomLeGrand/meL44k5k/ (Arrows to move the player and mousse to aim in a direction)
So,
I had some problems using the camera.follow (), moveToPointer () and world.scale.set () functions simultaneously. It seems that the world's scaling influence the x and y properties of world's object (like the camera, the input, etc...).
To be more specific, I can't use the camera.follow(