Every object clickable is drawn on a separate layer.
The screen during game play was going to look close to this:
Initially I made this background plainly for the purpose of creating a hidden object mini game, but after considering my scenario, I decided that it would make more sense to make the protagonist look for an object under scattered papers. This is the altered version of the background:
I might still be able to make use of the first version background and revive the hidden objects mini game, if I came up with an adequate scenario for it.