Pong in ActionScript3

import flash.display.MovieClip;
import flash.events.Event;
import fl.motion.MotionEvent;
import flash.events.KeyboardEvent;

var batspeed:Number = 10;
//Regra 4
var velocidade:Number=4;
var up: Boolean = false;
var down: Boolean = false;
var up2: Boolean = false;
var down2: Boolean = false;
//Regra 1
var Bola:MovieClip= new Ball();
stage.addChild(Bola);
var BolaX:Number=1;
var BolaY:Number=1;
//Regra 2
Bola.x = 275;
Bola.y = 200;
//Regra 1
var Start:MovieClip = new Begins();
stage.addChild(Start);
Start.x = 275;
Start.y = 200;
//Bola pelo stage
stage.addEventListener(Event.ENTER_FRAME, OnEnFr);
function OnEnFr (e:Event):void
{
    //Regra 4 e Regra 5
    Bola.x += BolaX * velocidade;
    Bola.y += BolaY * velocidade;
    if (Bola.y >= stage.stageHeight - Bola.height)
    {
        BolaY = -BolaY;
    }
     if(Bola.y <= 0)
    {
        BolaY = -BolaY;
    }
    if (Bola.x >= stage.stageWidth - Bola.width)
    {
        BolaX = -BolaX;
    }
     if(Bola.x <= 0)
    {
        BolaX = -BolaX;
    }
}
//Regra 1
var Batedor1:MovieClip= new Player1();
var Batedor2:MovieClip= new Player2();
stage.addEventListener(MouseEvent.CLICK, OnCl);
//Funcao que vai adicionar batedores, placares zerados
function OnCl (e:MouseEvent) : void
{
    stage.removeEventListener(Event.ENTER_FRAME, OnEnFr);
    stage.removeChild(Start);
    stage.removeChild(Bola);
    stage.addChild(Batedor1);
    //Regra 7
    Batedor1.x = 4;
    Batedor1.y = 200;
    stage.addChild(Batedor2);
    //Regra 8
    Batedor2.x = 546;
    Batedor2.y = 200;
    stage.addChild(Bola);
    //Regra 2
    Bola.x = 275;
    Bola.y = 200;
    BolaX = 1;
    BolaY = 1;
}
//Código para movimento de bola, colisão e limites
stage.addEventListener(Event.ENTER_FRAME, BallIG);
stage.addEventListener(Event.ENTER_FRAME, placares);
function BallIG (e:Event) : void
{
    //Velocidade Inicial da Bola
    Bola.x += BolaX * 4;
    Bola.y += BolaY * 4;
    //Limite da Bola no Stage
    if (Bola.y > stage.stageHeight || Bola.y < 0)
    {
        //Regra 9 e 10
        BolaY = -BolaY;
    }
    //Colisão no Batedor 1 e 2
    //Regra 11 e 12
    if (Bola.hitTestObject(Batedor1) || Bola.hitTestObject(Batedor2))
    {
        BolaX = -BolaX;
    }
}
//Mudar  o Placar e fazer Bola Retornar ao centro do stage
function placares (e:Event) : void
{
    //Regra 6
    if (Bola.x < 0 - Bola.width)
    {
        //Regra 18
        ScorePl2.text = (int(ScorePl2.text) +1).toString();
        Bola.x = 275;
        Bola.y = 200;
        //Regra 13
        if(BolaY < 0)
            {
                BolaY = (BolaY * -1);
            }
            BolaX = BolaX - 1;
            BolaY = BolaY + 1;
    }
    if (Bola.x > stage.stageWidth + Bola.width)
    {
        //Regra 18
        ScorePl1.text = (int(ScorePl1.text)+1).toString();
        Bola.x = 275;
        Bola.y = 200;
        //Regra 13
        if(BolaY < 0)
            {
                BolaY = BolaY * -1;
            }
        BolaX = BolaX + 1;
        BolaY = BolaY + 1;
    }
    //Regra 19
    if (ScorePl1.text == "10")
    {
        stage.removeEventListener(Event.ENTER_FRAME, BallIG);
        var Victory1:MovieClip= new Victory1MC();
        stage.addChild(Victory1);
        Victory1.x = 275;
        Victory1.y = 200;
    }
    //Regra 19
    if (ScorePl2.text == "10")
    {
        stage.removeEventListener(Event.ENTER_FRAME, BallIG);
        var Victory2:MovieClip= new Victory2MC();
        stage.addChild(Victory2);
        Victory2.x = 275;
        Victory2.y = 200;
    }

}
//Movimento do Batedor 1
stage.addEventListener(KeyboardEvent.KEY_UP, OnKeUp);
stage.addEventListener(KeyboardEvent.KEY_DOWN, OnKeDo);
stage.addEventListener(KeyboardEvent.KEY_UP, OnKeUp2);
stage.addEventListener(KeyboardEvent.KEY_DOWN, OnKeDo2);
function OnKeDo (e:KeyboardEvent) : void
{
    //Regra 14
    if (e.keyCode == 87)
    {
        up = true;
    }
    if (e.keyCode == 83)
    {
        down = true;
    }
    if(Batedor1.y < 0)
    {
        Batedor1.y = 0
    }
    if (Batedor1.y > stage.stageHeight - Batedor1.height)
    {
        Batedor1.y = stage.stageHeight - Batedor1.height;
    }
}
function OnKeUp (e:KeyboardEvent) : void
{
    if (e.keyCode == 87)
    {
        up = false;
    }
    if (e.keyCode == 83)
    {
        down = false;
    }
}
stage.addEventListener(Event.ENTER_FRAME, OnEnFrPl1);
stage.addEventListener(Event.ENTER_FRAME, OnEnFrPl2);
function OnEnFrPl1 (e:Event) : void
{
    if (up && (Batedor1.y - (Batedor1.height / 2)) > 0)
    {
        Batedor1.y -= batspeed;
    }
    if (down && (Batedor1.y + (Batedor1.height / 2)) < stage.stageHeight )
    {
        Batedor1.y += batspeed;
    }

}
//Movimento do Batedor 2
function OnKeDo2 (e:KeyboardEvent) : void
{
    //Regra 15
    if (e.keyCode == 38)
    {
        up2 = true;
    }
    if (e.keyCode == 40)
    {
        down2 = true;
    }
}
function OnKeUp2 (e:KeyboardEvent) : void
{
    if (e.keyCode == 38)
    {
        up2 = false;
    }
    if (e.keyCode == 40)
    {
        down2 = false;
    }
}
function OnEnFrPl2 (e:Event) : void
{
    //Regra 16
    if (up2 && (Batedor2.y - (Batedor2.height / 2)) > 0)
    {
        Batedor2.y -= batspeed;
    }
    if (down2 && (Batedor2.y + (Batedor2.height / 2)) < stage.stageHeight )
    {
        Batedor2.y += batspeed;
    }
}
//Regra 17 está no Stage