[Wolsh]

Для начала сделали бы короткие ссылки на клипы – ладно Вам трудно читать, но и плееру придется бегать по всем закоулкам, проверяя Ваши условия.
Как-то так:

private function keyFocus(e:KeyboardEvent):void 
{
	var restart:MovieClip = interfac.pouse_mc.restart_btn;
	var gallery:MovieClip = interfac.pouse_mc.gallery_btn;
	var help:MovieClip = interfac.pouse_mc.help_btn;
	var resume:MovieClip = interfac.pouse_mc.resume_btn;
	var focus:InteractiveObject = super.stage.focus;
 
if (e.keyCode == 37) {
		switch(focus) {
			case restart : focus = gallery; break;
			case gallery : focus = help; break;
			case help : focus = resume; break;
			case resume : focus = restart; break;
		}
	}
	if (e.keyCode == 39) {
		switch(focus) {
			case restart : focus = resume; break;
			case resume : focus = help; break;
			case help : focus = gallery; break;
			case gallery : focus = restart; break;
		}
	}
	if (e.keyCode == 13) {
		switch(focus) {
			case restart : restartLevel(); break;
			case gallery : returnToGallery(); break;
			case help : ; break;
			case resume : resumeGame(); break;
		}
	}
	super.stage.focus = focus;
}