Yeah, that’s the same thing that came to my mind. It’s really very simple, 2D picking is not a huge task in my opinion. For picking 3D objects (clicking on a monster, a keeping or something like this) I use a combination of JPCT library (http://www.jpct.net/doc/com/threed/jpct/Interact2D.html) and an own implementation. But it’s also not that comprehensive.
Thanks, I made all the graphics. But… what art in particular, do you mean?