Phaser simple Game lags on mobile

[Shashank Padwal]

Hi,

I am new to phaser as well as game designing.
I created my first game as hobby using phaser.
it is working fine in desktop but lags very bad on mobile devices.
Images I am using for game is very small.
game is smaller that 2mb.
I am attaching my main.js file 

hope someone can help me.

thanks 

var buttetSpwanSpeed;
var bulletSpeed;
var enemySpwanSpeed;
var enemySpeed;
var golis;
var enemies;
var enemyLoop;
var scoreText;
var powers;
var bulletSize;
setStart();
//game phaser
var game=new Phaser.Game(window.innerWidth, window.innerHeight, Phaser.WebGL,"");
var BootState={
	//loding accets
	preload: function(){
		this.load.image('LodingScreen', 'assets/desimulga.png');
		this.load.image('background', 'assets/blue.png');
	},
	create: function(){
		game.state.start("LoadingState");
	},
	
};

var LoadingState={
	//loding acc
	preload: function(){
		bg=this.game.add.tileSprite(0,0,600,300,'background');
		bg.height = game.height;
    	bg.width = game.width;
		LodingScreen=this.game.add.sprite(this.game.world.centerX,this.game.world.centerY,'LodingScreen');
		LodingScreen.anchor.setTo(0.5);
		LodingScreen.scale.setTo(0.5,0.5);
		this.load.image('spaceship', 'assets/player.png');
		this.load.image('goli', 'assets/bullet.png');
		//load ememies
		this.load.image('enemy1', 'assets/enemies/enemy1.png');
		this.load.image('enemy2', 'assets/enemies/enemy2.png');
		this.load.image('enemy3', 'assets/enemies/enemy3.png');
		this.load.image('enemy4', 'assets/enemies/enemy4.png');
		this.load.image('enemy5', 'assets/enemies/enemy5.png');
		this.load.spritesheet('power1', 'assets/power/bulletUp.png',34,33,4);

		this.load.image('restart', 'assets/restart.png');
		this.load.spritesheet('blast', 'assets/explosion.png',400,400,8);
		game.load.audio('fire', 'assets/music/bullet.mp3');
		game.load.audio('killed', 'assets/music/killed.mp3');
		//game.load.audio('bg_music', 'assets/music/background.mp3');
		game.load.audio('death_music', 'assets/music/death.mp3');
		game.load.audio('start_music', 'assets/music/start.mp3');
	},
	create: function(){
		game.time.events.add(Phaser.Timer.SECOND * 2, function(){
			bg.kill();
			LodingScreen.kill();
			game.state.start("PreGameState");
	},this);
	},
	
};

var PreGameState={
	//loding accets
	create: function(){
		game.scale.refresh();
		bg=this.game.add.tileSprite(0,0,600,300,'background');
		bg.height = game.height;
    	bg.width = game.width;
		Startb=this.game.add.text(this.game.world.centerX,this.game.world.centerY, 'TAP TO START' , { fontSize: '32px', fill: 'yellow' });
		Startb.anchor.setTo(0.5);
		Startb.scale.setTo(0.5,0.5);
		ship=this.game.add.sprite(this.game.world.centerX,this.game.world.height*0.4,'spaceship');
		ship.scale.setTo(0.4);
		ship.anchor.setTo(0.5);
		game.physics.arcade.enable(ship);
		bg.inputEnabled=true;

		start_music = game.add.audio('start_music');
    	start_music.allowMultiple = true;
    	start_music.addMarker('start_music', 0, 30);
		

		bg.events.onInputDown.add(function(){
			bg.inputEnabled=false;
			Startb.kill();
			start_music.play("start_music");
			// game.physics.arcade.moveToXY(ship, this.game.world.centerX, this.game.world.height*0.8, 300, 3000);
			// game.add.tween(ship).to( { y: game.world.height*0.8 }, 3000, Phaser.Easing.Sinusoidal.InOut, true);
			var tween = game.add.tween(ship).to({
			x: [this.game.world.centerX, this.game.world.width*0, this.game.world.width, this.game.world.centerX],
			y: [this.game.world.height*0.4, this.game.world.height*0.5, this.game.world.height*0.6, this.game.world.height*0.8],
			}, 2000,Phaser.Easing.Quadratic.Out, true).interpolation(function(v, k){
			    return Phaser.Math.bezierInterpolation(v, k);
			});

			game.time.events.add(Phaser.Timer.SECOND * 2, function() { 
				bg.kill();
				ship.kill();
				game.state.start("GameState");
			} ,this);
			
		}, this);
	},
	
};





var GameState={
	//loding accets
	preload: function(){
		

	},
	create: function(){
		//background
		this.background=this.game.add.tileSprite(0,0,600,300,'background');
		this.background.height = game.height;
    	this.background.width = game.width;
		this.background.inputEnabled=true;
		this.background.input.enableDrag(true);
		this.background.input.startDrag = function(pointer) {
		    pointer.shipStart = new Phaser.Point(GameState.ship.x, GameState.ship.y);
		    Phaser.InputHandler.prototype.startDrag.call(this, pointer);
		};
		this.background.input.updateDrag = function(pointer) {
		    GameState.ship.x = pointer.shipStart.x - pointer.positionDown.x + pointer.x;
		    GameState.ship.y = pointer.shipStart.y - pointer.positionDown.y + pointer.y;
		    GameState.background.x=0;
		    GameState.background.y=0;
		};
		//ship
		this.ship=this.game.add.sprite(this.game.world.centerX,this.game.world.height*0.8,'spaceship');
		this.ship.scale.setTo(0.4);
		this.ship.anchor.setTo(0.5);
		game.physics.arcade.enable(this.ship);
		// this.ship.inputEnabled=true;
		// this.ship.input.enableDrag(true);
		//score
		this.scoreText = this.game.add.text(16, 16, 'Kills: 0', { fontSize: '32px', fill: '#fff' });
		//background Music
		// music = game.add.audio('bg_music');
    	//music.play('', 0, 1, true);
		//bullet sound
		bullet_sound = game.add.audio('fire');
    	bullet_sound.allowMultiple = true;
		bullet_sound.volume=0.5;
    	bullet_sound.addMarker('fire', 0, 0.5);
    	//Killed sound
		killed_sound = game.add.audio('killed');
    	killed_sound.allowMultiple = true;
    	killed_sound.addMarker('killed', 0, 0.5);
    	//death music
    	death_music = game.add.audio('death_music');
    	death_music.allowMultiple = true;
    	death_music.addMarker('death_music', 0, 10);
    	//groups of bullets and enemies
    	golis=game.add.group();
    	enemies=game.add.group();
    	powers=game.add.group();
		//fire bullet loop
		fireLoop=game.time.events.loop(Phaser.Timer.SECOND*1/buttetSpwanSpeed, fireBullet, this);
		//this.game.input.onTap.add(fireBullet, this);
		//create ememy loop
		enemyLoop=game.time.events.loop(Phaser.Timer.SECOND*1/enemySpwanSpeed, createEnemy, this);
		//change ememy speed and enemy spwan speed loop
		enemySpeedLoop=game.time.events.loop(Phaser.Timer.SECOND*1.5, changeEnemySpeed, this);
		//give powerup
		powerUp=game.time.events.loop(Phaser.Timer.SECOND*20, powerFun, this);		
	},
	update: function(){
		//scrolling background
		this.background.tilePosition.y+=2;

		//keybord control
		if (game.input.keyboard.isDown(Phaser.Keyboard.UP))
		{
			this.ship.y-=2;
		}
		if (game.input.keyboard.isDown(Phaser.Keyboard.DOWN))
		{
			this.ship.y+=2;
		}
		if (game.input.keyboard.isDown(Phaser.Keyboard.RIGHT))
		{
			this.ship.x+=2;
		}
		if (game.input.keyboard.isDown(Phaser.Keyboard.LEFT))
		{
			this.ship.x-=2;
		}

		//dont go out
		if(this.ship.y<0+this.ship.height/2)
		{
			this.ship.y=0+this.ship.height/2;
		}
		if(this.ship.y>this.game.world.height-this.ship.height/2)
		{
			this.ship.y=this.game.world.height-this.ship.height/2;
		}

		if(this.ship.x<0+this.ship.width/2)
		{
			this.ship.x=0+this.ship.width/2;
		}
		if(this.ship.x>this.game.world.width-this.ship.width/2)
		{
			this.ship.x=this.game.world.width-this.ship.width/2;
		}
		//check for collisions 
		game.physics.arcade.overlap(golis,enemies,b_e_collide,null,this);
		game.physics.arcade.overlap(this.ship,enemies,s_e_collide,null,this);
		game.physics.arcade.overlap(this.ship,powers,s_power1_collide,null,this);



		
	},
};


//setting start game conditions
function setStart(){
	buttetSpwanSpeed=2;
	bulletSpeed=2000;
	enemySpwanSpeed=1;
	enemySpeed=300;
	score=0;
	bulletSize=1.2
}

//fire bullet function
function fireBullet(){
	goli=this.game.add.sprite(this.ship.x,this.ship.y-this.ship.height/2,'goli');
	goli.anchor.setTo(0.5);
	goli.scale.setTo(bulletSize,1);
	goli.checkWorldBounds = true;
	goli.outOfBoundsKill = true;
	//adding to group
	golis.add(goli);
	game.world.moveDown(goli);
	game.physics.arcade.enable(goli);
	goli.body.collisonWorldBounds=true;
	goli.body.velocity.y=-bulletSpeed;
	bullet_sound.play("fire");
}
//create enemy function
function createEnemy(){
	enemyNo=game.rnd.integerInRange(1, 5);
	x1=game.rnd.integerInRange(0,this.game.world.width);
	x2=game.rnd.integerInRange(0,this.game.world.width);
	enemy=this.game.add.sprite(x1,10,'enemy'+enemyNo);
	enemy.anchor.setTo(0.5);
	enemy.scale.setTo(0.4);
	enemy.checkWorldBounds = true;
	enemies.add(enemy);
	enemy.outOfBoundsKill = true;
	game.physics.arcade.enable(enemy);
	enemy.body.collisonWorldBounds=true;
	enemy.angle=90;
	enemy.no=enemyNo;

	//moving enemy
	angleRedian=game.physics.arcade.moveToXY(enemy, x2, this.game.world.height+enemy.height, enemySpeed,0);
	angleDegree=angleRedian*57.2958;
	enemy.angle=90+angleDegree;

}

//runs when bullet collide to enemy
function b_e_collide(goli,enemy){
	//blast
	blast=this.game.add.sprite(enemy.x,enemy.y,'blast');
	blast.anchor.setTo(0.5);
	blast.scale.setTo(0.5);
	var explosion=blast.animations.add('explosion');
	blast.animations.play('explosion',30,false,true);

	//killing
	goli.kill();
	enemy.kill();

	//update scores
	if(enemy.no<4)
	{
		score+=1;
		killed_sound.play('killed');
	}
	this.scoreText.text = 'Kills: ' + score;
}
//runs when ship collide to enemy
function s_e_collide(ship,enemy){

	blast=this.game.add.sprite(enemy.x,enemy.y,'blast');
	blast.anchor.setTo(0.5);
	blast.scale.setTo(0.5);
	var explosion=blast.animations.add('explosion');
	blast.animations.play('explosion',10,false,true);
	ship.kill();
	enemy.kill();
	//music.stop();
	this.scoreText.kill();
	death_music.play("death_music");
	game.time.events.remove(fireLoop);
	game.time.events.add(Phaser.Timer.SECOND * 2, function() {    
		fianlScore = this.game.add.text(this.game.world.centerX,this.game.world.centerY, 'KILL: '+score, { fontSize: '32px', fill: 'yellow' });
		fianlScore.anchor.setTo(0.5);
		gameOverText = this.game.add.text(this.game.world.centerX,this.game.world.centerY - fianlScore.height, 'GAME OVER', { fontSize: '32px', fill: 'red' });
		gameOverText.anchor.setTo(0.5);
		//restart button
		restart=this.game.add.sprite(this.game.world.centerX,this.game.world.centerY + fianlScore.height+10,'restart');
		restart.anchor.setTo(0.5);
		restart.scale.setTo(0.05,0.05);
		restart.inputEnabled = true;
		restart.events.onInputDown.add(restartGame, this);
		game.time.events.stop();
	}, this);

}
//runs when ship collide power1
function s_power1_collide(ship,power){
	power.kill();
	game.time.events.remove(fireLoop);
	fireLoop=game.time.events.loop(Phaser.Timer.SECOND*1/10, fireBullet, this);
	game.time.events.add(Phaser.Timer.SECOND * 10, function(){
		game.time.events.remove(fireLoop);
		fireLoop=game.time.events.loop(Phaser.Timer.SECOND*1/buttetSpwanSpeed, fireBullet, this);
	},this);



}


function changeEnemySpeed()
{	
	if(enemySpeed<=900)
	{
		enemySpeed+=5;
	}
	if(enemySpwanSpeed<=3)
	{
		enemySpwanSpeed+=0.025;
	}
	enemyLoop.delay=Phaser.Timer.SECOND*1/enemySpwanSpeed;
}

//send power up
function powerFun()
{
	x1=game.rnd.integerInRange(0,this.game.world.width);
	x2=game.rnd.integerInRange(0,this.game.world.width);
	power=this.game.add.sprite(x1,10,'power1');
	power.anchor.setTo(0.5);
	var shine=power.animations.add('shine');
	power.animations.play('shine',5,true,true);
	power.checkWorldBounds = true;
	power.outOfBoundsKill = true;
	powers.add(power);
	game.physics.arcade.enable(power);
	power.body.collisonWorldBounds=true;
	game.physics.arcade.moveToXY(power, x2, this.game.world.height+power.height, 400,0);
	powerDelay=game.rnd.integerInRange(20,35);
	powerUp.delay=Phaser.Timer.SECOND*powerDelay;
}



function restartGame(){
	setStart();
	game.time.events.start();
	game.state.start("PreGameState");	
}



game.state.add("GameState",GameState);
game.state.add("BootState",BootState);
game.state.add("LoadingState",LoadingState);
game.state.add("PreGameState",PreGameState);
game.state.start("BootState");

 

main.js