Neither the text nor the OnClick/OnDrag/OnClose stuff works (I will probably remove most of that).
It shouldn't need a controls_left.png??? You defined the images to menu_up.png and menu_down.png, so that is all you should need. Yes, one is of all the buttons up and the other of all the buttons down.
The squished buttons you are getting was solved I thought, but I guess it is still there in the NoEX version. I will try to get a new version out soon. If you want to PM me your e-mail address I can send you a private beta that should not flicker and will draw the buttons right.
Also, I have never tested the loading image feature. I will look into the alt-tab bug you discovered.