Glad you're liking it so far!
I've been doing some more interface stuff today, such as:
1) The addition of the abilities bar across the bottom. The ability button that's there on the left is not yet functional but it will be soon.
2) The addition of the ring of buttons on the bottom right. These buttons can be toggled visible or invisible by pressing the large center button. The small buttons open up various windows/functions of the game, such as inventory, stats, ability information, etc. They're just an alternative to using hotkeys to open these windows for those who prefer. The large, inner button works perfectly fine right now but the outer ring of buttons do not do anything yet. Also, the graphics are placeholders for now.
Again..thanks to Mumbling for the grey button of awesomeness.
I will also create some options later on for how visible the interface elements will be (transparency level, on/off, etc.) for players who prefer more interface stuff on the screen for easy access, or for players who prefer to have less clutter.
Anyway, screenshot time!
With the full ring of buttons showing:

And with the ring of buttons turned off:

Getting that button to work without breaking any of the camera control was a royal pain, but it finally works so I'm excited and felt like posting up some screenshots.

Also, the new transparent area in the bottom left will hold an Experience point progress meter, showing your % completion to the next level.