[MrPoma]

мувиеклип.addEventListener(MouseEvent.MOUSE_OVER, mouseOverHandler);
мувиеклип.addEventListener(MouseEvent.MOUSE_OUT, mouseOutHandler);
 
private function mouseOverHandler(event:MouseEvent):void{
     gotoAndPlay('кубик, раскукожся!');
}
 
private function mouseOutHandler(event:MouseEvent):void{
     gotoAndPlay('кубик, скукожся!');
}