[udaaff]

Самый элементарный вариант

var dictance:Number = 10;
var angle:Number = 5
//
var keyListener_obj:Object = new Object();
keyListener_obj.onKeyDown = function() {
	switch (Key.getCode()) {
	case Key.LEFT :
		arrow_mc._rotation -= angle;
		break;
	case Key.RIGHT :
		arrow_mc._rotation += angle;
		break;
	case Key.UP :
		arrow_mc._x += dictance*Math.sin(arrow_mc._rotation*Math.PI/180);
		arrow_mc._y -= dictance*Math.cos(arrow_mc._rotation*Math.PI/180);
		break;
	case Key.DOWN :
		arrow_mc._x -= dictance*Math.sin(arrow_mc._rotation*Math.PI/180);
		arrow_mc._y += dictance*Math.cos(arrow_mc._rotation*Math.PI/180);
		break;
	}
};
Key.addListener(keyListener_obj);