Hello, if you download the free version, you will get the images. You can use imagemap in renpy. If you use other engine like ex. visual novel maker, there has also similar feature like imagemap. If you dont know how imagemap works - here is the documentation from the official renpy site.
If you use renpy engine, you can simply apply this GUI by downloading the paid version, you will get a renpy project and you just need to move it to your renpy projects list and launch it.
I hope the information helps you. (・∀・)
If you have any further questions, feel free to send me an email or drop a comment below.