Background Image Clickable?

Twine 2.0 Harlowe Version 2.1.1

Is it possible to have a background image clickable? I have the code set up in my Story Stylesheet and the background image works fine. I'm also inserting

<script>$('body').removeClass().addClass('castle')</script>

into passages I want the background image to be in.

Example: Background image is a tree. Click anywhere on the background image to be sent to the next passage.