smoother movement

score:

import flash.events.KeyboardEvent;

var moveRight:Boolean = false      
var moveLeft:Boolean = false
var moveUp:Boolean = false
var moveDown:Boolean = false





stage.addEventListener(Event.ENTER_FRAME,moveShip);

function moveShip(event:Event) {

if (moveRight==true){
ship.x+=3;
}

if (moveLeft==true){
ship.x-=3;
}

if (moveUp==true){
ship.y-=3;
}

if (moveDown==true){
ship.y+=3;
}
}
//listens to keyboard being pressed
stage.addEventListener(KeyboardEvent.KEY_DOWN, pressKey);
stage.addEventListener(KeyboardEvent.KEY_UP, stopShip);


//if not pressed set move ship to false.
function stopShip(myevent:KeyboardEvent):void{
moveLeft=false;
moveRight=false;
moveUp=false;
moveDown=false;
}

//if pressed set move ship to true.
function pressKey(myevent:KeyboardEvent):void{
if(myevent.keyCode==Keyboard.RIGHT){
moveRight=true;
}

if(myevent.keyCode==Keyboard.LEFT){
moveLeft=true;
}

if(myevent.keyCode==Keyboard.UP){
moveUp=true;
}

if(myevent.keyCode==Keyboard.DOWN){
moveDown=true;
}
}