Marsal:
I think the part sticking up from the general line of the interface is fine for a few reasons. First I think it looks good (it looks ok without it, but I prefer it there). Second, it's quite a subtle curve rather than an in-your-face protrusion.
Third - and perhaps most importantly -, if anything it draws attention to exactly the part of the interface the player ought to be looking at most of the time. The text window is very much a part of the player's window into the game world. Having an interface element which draws attention to buttons or decoration is not good. What you have at the moment doesn't do that - it draws the eye directly to the part of the interface which you want the player looking at.
This is not a bad thing IMO.
With regard to the single-stone-blocks-for-icons, I think you should do one of two things:
(1) Keep the icons separate from the background, as in your edited versions.
(2) Integrate the icons so that they look like part of the stone blocks themselves - e.g. carved in to them / embossed / whatever.
I think having the icons as they are floating above individual blocks looks artificial. Having each icon look like an intrinsic part of its block would be a different matter entirely. I think I'd like that a lot if you could do it. (It'd also probably make things seem a little less cluttered, to the anti-clutterists around here)
I also think the AP bar looks a little silly. It's a decent idea, but it's not really necessary (the game's not real time, so there's no need to give the player visual feedback he can take in at a glance), and doesn't do much for the look I think.
I don't hate the HP/AP, but I do think you should give some thought to adjusting it. Perhaps something as slight as moving them fractionally / changing size / changing font would help - I'm not sure (actually I quite like the font). They just don't really say "I belong here" to me.
I like the general color and look of the weapon slots, but perhaps you could blend them in more effectively. For instance, having them look like objects mounted on the stone wall (metal plates or something??), rather than separate boxes with no clear business there. [if they're supposed to look like they fit in at present, I'm not seeing how]
Oh and lose the disk. It's evil.
Great work etc. etc. - I wouldn't be making all these suggestions if I didn't like it.
Elhoim:
I like the little guy under the AP sign - nice. The HP guy is decent, but not so great - do you have any other little guys to choose from, or are those the only ones?
I'm not sure about the HP/AP numbers. They look a little out of place somehow. I'm not sure how you could change them though. Perhaps they would seem better to me with some kind of framing effect - for instance the HP guy could be in an oval (vertical) shaped depression, containing him and the 45. This isn't going to work for the AP guy though. (perhaps it would if you reduced the width of the weapon slots very slightly, but it's only a thought)
The numbers just seem to be floating aimlessly to me at present.
Don't lose the little guys though. [but do lose the disk - it's EVIL]
android:
Just to let you know I'm not a big fan of the head. I have no good reason here - I just don't particularly like it for some reason. Make of this what you will.