ActionScript 3 On Click

quick question: say that i wanted to make a mobile version of this site, would I have to make a completely separate .fla ?

Sorry. I swear a read key. Haha

Here is a version of the code working with two buttons to pause and unpause (bt_18 and bt_19). I only updated the beginning.

package
{
    import flash.events.MouseEvent;
    import flash.display.MovieClip;
    import flash.events.KeyboardEvent;
    import flash.ui.Keyboard;
    import flash.events.Event; //used for ENTER_FRAME event
   
    public class Main extends MovieClip
    {
        //constants
        const gravity: Number = 1.5; //gravity of the game
        const dist_btw_obstacles: Number = 300; //distance between two obstacles
        const ob_speed: Number = 8; //speed of the obstacle
        const jump_force: Number = 15; //force with which it jumps
       
        //variables
        var player: Player = new Player();
        var lastob: Obstacle = new Obstacle(); //varible to store the last obstacle in the obstacle array
        var obstacles: Array = new Array(); //an array to store all the obstacles
        var yspeed: Number = 0; //A variable representing the vertical speed of the bird
        var score: Number = 0; //A variable representing the score
       
        var paused:Boolean = false;
       
        public function Main()
        {
            init();
        }
       
        function init(): void
        {
            //initialize all the variables
            player = new Player();
            lastob = new Obstacle();
            obstacles = new Array();
            yspeed = 0;
            score = 0;
            //add player to center of the stage the stage
            player.x = stage.stageWidth / 2;
            player.y = stage.stageHeight / 2;
            addChild(player);
            //create 3 obstacles ()
            createObstacle();
            createObstacle();
            createObstacle();
            //Add EnterFrame EventListeners (which is called every frame) and KeyBoard EventListeners
            addEventListener(Event.ENTER_FRAME, onEnterFrameHandler);           
            stage.addEventListener(KeyboardEvent.KEY_UP, key_up);
            bt_18.addEventListener(MouseEvent.MOUSE_DOWN, mouseHandler);
            bt_19.addEventListener(MouseEvent.MOUSE_DOWN, mouseHandler);
        }
       
        private function mouseHandler(event: MouseEvent)
        {
            if (!paused && event.currentTarget == bt_18)
            {
                paused = true;
                removeEventListener(Event.ENTER_FRAME, onEnterFrameHandler);
            }           
            else if (paused && event.currentTarget == bt_19)
            {
                paused = false;
                addEventListener(Event.ENTER_FRAME, onEnterFrameHandler);
            }               
        }
       
        private function key_up(event: KeyboardEvent)
        {
            if (event.keyCode == Keyboard.SPACE)
            {
                if (!paused)
                {
                    //If space is pressed then make the bird
                    yspeed = -jump_force;
                }
            }               
        }
       
        function restart()
        {
            if (contains(player))
                removeChild(player);
           
            for (var i: int = 0; i < obstacles.length; ++i)
            {
                if (contains(obstacles) && obstacles != null)
                    removeChild(obstacles);
                obstacles = null;
            }
           
            obstacles.slice(0);
            init();
        }
       
        function onEnterFrameHandler(event: Event)
        {
            //update player
            yspeed += gravity;
            player.y += yspeed;
           
            //restart if the player touches the ground
            if (player.y + player.height / 2 > stage.stageHeight)
            {
                restart();
            }
            //Don't allow the bird to go above the screen
            if (player.y - player.height / 2 < 0)
            {
                player.y = player.height / 2;
            }
            //update obstacles
            for (var i: int = 0; i < obstacles.length; ++i)
            {
                updateObstacle(i);
            }
           
            //display the score
            scoretxt.text = String(score);
        }
       
        //This functions update the obstacle
        function updateObstacle(i: int)
        {
            var ob: Obstacle = obstacles;
            if (ob == null)
                return;
            ob.x -= ob_speed;
            if (ob.x < -ob.width)
            {
                //if an obstacle reaches left of the stage then change its position to the back of the last obstacle
                changeObstacle(ob);
            }
            //If the bird hits an obstacle then restart the game
            if (ob.hitTestPoint(player.x + player.width / 2, player.y + player.height / 2, true) || ob.hitTestPoint(player.x + player.width / 2, player.y - player.height / 2, true) || ob.hitTestPoint(player.x - player.width / 2, player.y + player.height / 2, true) || ob.hitTestPoint(player.x - player.width / 2, player.y - player.height / 2, true))
            {
                restart();
            }
            //If the bird got through the obstacle without hitting it then increase the score
            if ((player.x - player.width / 2 > ob.x + ob.width / 2) && !ob.covered)
            {
                ++score;
                ob.covered = true;
            }
        }
       
        //This function changes the position of the obstacle such that it will be the last obstacle and it also randomizes its y position
        function changeObstacle(ob: Obstacle)
        {
            ob.x = lastob.x + dist_btw_obstacles;
            ob.y = 100 + Math.random() * (stage.stageHeight - 200);
            lastob = ob;
            ob.covered = false;
        }
       
        //this function creates an obstacle
        function createObstacle()
        {
            var ob: Obstacle = new Obstacle();
            if (lastob.x == 0)
                ob.x = 800;
            else
                ob.x = lastob.x + dist_btw_obstacles;
            ob.y = 100 + Math.random() * (stage.stageHeight - 200);
            addChild(ob);
            obstacles.push(ob);
            lastob = ob;
        }
    }
}