Character getting faster everytime I reset my game from gameover screen in action script 3 - actionscript-3

Question

My game starts with a start frame. click a button to the game. if I hit an object I go to game over screen. Everytime I hit the start over button on the game over screen my characters controls get faster. I have set no variables for speed, simply just "mc_guy.x +=3" or .y , etc. If I had to say by how much faster I would want to say that the speed doubles.
import flash.events.Event;
import flash.ui.Keyboard;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.display.MovieClip;
//prevent game loop
stop();
// event listeners for movement
mc_Guy.addEventListener(Event.ENTER_FRAME, update);
stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDownGuy);
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyUpGuy);
// this array holds references to all the keys
var keys:Array = [];
//initiate default values
fuelGauge.height = 100;
//Gravity
addEventListener(Event.ENTER_FRAME,Gravity)
var GyAmt:Number = 5;
function Gravity(e:Event){
mc_Guy.y += GyAmt;
if (gameFloor.hitTestObject(mc_Guy)){
mc_Guy.y = gameFloor.y;}
else if (gameFloor2.hitTestObject(mc_Guy)){
mc_Guy.y = gameFloor2.y;}
else if (gameFloor3.hitTestObject(mc_Guy)){
mc_Guy.y = gameFloor3.y;}}
// the event listeners
function update(e:Event):void
{
if (keys[Keyboard.RIGHT])
{
mc_Guy.x += 3;
}
if (keys[Keyboard.LEFT])
{
mc_Guy.x -= 3;
}
if (keys[Keyboard.SPACE]){
mc_Guy.y -= 10;
//drain fuel
fuelGauge.height -= 1;
gaugePercent.text = String(fuelGauge.height)
if (fuelGauge.height == 0){
nextFrame();}}
}
function onKeyDownGuy(e:KeyboardEvent):void
{
keys[e.keyCode] = true;
}
function onKeyUpGuy(e:KeyboardEvent):void
{
keys[e.keyCode] = false;
}
//Array storing each wall
var MC_wall:Array = new Array(mc_Wall,mc_Wall2,mc_Wall5,
mc_Wall6,mc_Wall7,mc_Wall8,mc_Wall9,mc_Wall10,mc_Wall11,mc_Wall12, mc_Wall13)
//Collision Detection
addEventListener(Event.ENTER_FRAME,loop);
function loop(e:Event){
var i:Number = 0;
do {
if (MC_wall[i].hitTestObject(mc_Guy)){
nextFrame();}
i++;
} while (i < MC_wall.length);
/* for (var i:Number = 0; i < MC_wall.length; i++){
if (MC_wall[i].hitTestObject(mc_Guy)){
nextFrame();}
}*/
if(mc_Guy.hitTestPoint(mc_WallRun.x, mc_WallRun.y, false)){
nextFrame();}
else if(mc_Guy.hitTestObject(fuelPowerup)){
removeChild(fuelPowerup);
fuelGauge.height = 100;
gaugePercent.text = String(fuelGauge.height)}
else if(mc_Guy.hitTestObject(doorKey)){
removeChild(doorKey)
//open door
mc_Wall13.height -=20
mc_Wall13.y -= 10
}
}
//Object Movement
addEventListener(Event.ENTER_FRAME, onEnterFrame);
var spinSpeed:Number=6;
var axisMove:Number = 90;
var axisMovement:Number = 3;
function onEnterFrame(event:Event):void
{
mc_WallRun.rotation+=spinSpeed;
//count the movement on axis and move
axisMove -= 3;
mc_Wall9.x += axisMovement;
gameFloor3.x += axisMovement * .9;
if(axisMove <= 0){
axisMove += 90
axisMovement = axisMovement*-1
}
}
Gameover frame:
import flash.events.MouseEvent;
stop();
restartGame.addEventListener(MouseEvent.MOUSE_DOWN, playAgain);
function playAgain(event:MouseEvent):void{
prevFrame();
}

Answer 1

It sounds like when you restart your game
mc_Guy.addEventListener(Event.ENTER_FRAME, update);
is called again, without removing the previously added listener.
So update is now called two times on Event.ENTER_FRAME, and then once more per frame per game reset, causing the guy to move faster.