Hmm... it gives me the "gamemaker" feeling, Im not sure if it's made in it.
Anyway, is it a browser, it uses IEs rendering engine (I have IE 7 beta 2, only browser in which fonts are rendered smooth), so shouldnt we say it's more like GUI using IEs functionality.
I made similar thing in Visual Basic and that was called "Light browser", funny. Making it in visual basic tookt just couple of clicks and one minute.
Anyway, if you're making this futher, I suggest you achieve same or better GUI and functionality like in IE (but firefox all the way anyway).