Converting Keydown to mouseclick/touchevent.

I am creating a simple game, where crunk, flies up and down with the help of gravity. At the moment, my code only works for the arrow keys on the keyboard, and I am looking to convert the code so that the user could press on the screen/click to make Crunk fly. In short, I am trying to convert a keydown event, to a touchevent or mouseclick event.I am fairly new to flash so go easy on me.

Current code:

var keysDown:Array=[];
stage.focus=stage;
stage.addEventListener(KeyboardEvent.KEY_DOWN,addKey);
stage.addEventListener(KeyboardEvent.KEY_UP,removeKey);
function addKey(event:KeyboardEvent):void {
    keysDown[event.keyCode]=true;
}
function removeKey(event:KeyboardEvent):void {
    keysDown[event.keyCode]=false;
}
var timer:Timer=new Timer(25);
timer.addEventListener(TimerEvent.TIMER, tick);
timer.start ()
function tick(event:Event):void {
    if (keysDown[Keyboard.RIGHT]) {
        trace("right key is down!");
    }
}
var accelleration:Number=2;
var friction:Number=0.5;
var maxspeed:Number=15;
var backmaxspeed:Number=-15;
var yspeed:Number=0;
var gravity:Number=2;
var yaccelleration:Number=25;
var ground:Number=crunk.y;
var jumping:Boolean=false;
addEventListener(Event.ENTER_FRAME, jump);
function jump(e:Event):void {
    if (jumping) {
        crunk.y-=yspeed;
        if (crunk.y<=ground) {
            jumping=false;
        }
    }
    if ((keysDown[Keyboard.UP])) {
        jumping=true;
        yspeed=yaccelleration;
    }
    
    crunk.y-=yspeed;
   
   //Keeping the crunk within screen boundaries
    if ((crunk.y < ground)&&(jumping == false)) {
        yspeed-=gravity;
    }
    if (crunk.y>ground) {
        crunk.y=ground;
    }
     if (crunk.y< -121) {
        crunk.y=-119;
    }
    if (crunk.y< -115) {
        yaccelleration=0;
        
    }
    else (yaccelleration = 25)
}

Any help would be extremely helpful! If anyone could rewrite this code for mouseclick using the same variables that would be fine as well.