Hi Inverted,
Yes, the media library is fully expandable - adding new media into the library is easy using the 'import' button. I also intend to release some media add-on packs in the future, and the first one of these will be free to people with GUI Studio - so if there any particular styles you want me to include, let me know. I've already had a request for some medieval styled graphics.
In the standard library, there are 8 different styles of healthbar so far, all of which can be modified in terms of their colour and segmentation. You can also add healthbar holders, as in the example below, where a standard glass tube healthbar is housed within a graphite holder.
I've created a quick interface within GUI Studio to show you how you might construct an interface for an FPS game - the top screnshot shows it being created in the editor, and the bottom one shows you it working in 'FPS Preview mode', to give you an idea of how it might look in your own fps game. Of course, the interface I created is just what I've come up with by bolting a few entities together - you would create it and style it to suit your own tastes and needs.
As for a demo - hopefully some time next month.
