Hi,

I've used your fantastic code for my game but faced a bug when player exits from top right and enters from top left, it doesn't find correct ghost. If you re order the array of ghosts it will get fixed but I suspect it will have bug in another situation.

I've modified this:

if (ghost.position.x < screenWidth && ghost.position.x > -screenWidth &&
ghost.position.y < screenHeight && ghost.position.y > -screenHeight)

to this:
if (ghost.position.x < screenTopRight.x && ghost.position.x > screenTopLeft.x &&
ghost.position.y < screenTopRight.y && ghost.position.y > screenBottomRight.y)

To get it fixed.

Hope that helps someone!
Aidin