spacegame.js

var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, update: update, render: render });

function preload() {
    game.load.image('space', 'assets/skies/deep-space.jpg');
    game.load.image('bullet', 'assets/games/asteroids/bullets.png');
    game.load.image('ship', 'assets/games/asteroids/ship.png');
}

var sprite;
var cursors;
var emitter;
var bullet;
var bullets;
var bulletTime = 0;

function create() {
    //  This will run in Canvas mode, so let's gain a little speed and display
    game.renderer.clearBeforeRender = false;
    game.renderer.roundPixels = true;

    //  We need arcade physics
    game.physics.startSystem(Phaser.Physics.ARCADE);

    //  A spacey background
    game.add.tileSprite(0, 0, game.width, game.height, 'space');

    //  Our ships bullets
    bullets = game.add.group();
    bullets.enableBody = true;
    bullets.physicsBodyType = Phaser.Physics.ARCADE;

    //  All 40 of them
    bullets.createMultiple(40, 'bullet');
    bullets.setAll('anchor.x', 0.5);
    bullets.setAll('anchor.y', 0.5);

    //  Our player ship
    sprite = game.add.sprite(300, 300, 'ship');
    sprite.anchor.set(0.5);

    //  and its physics settings
    game.physics.enable(sprite, Phaser.Physics.ARCADE);

    sprite.body.drag.set(100);
    sprite.body.maxVelocity.set(200);
    console.log("player", sprite.body);
    
    emitter = game.add.emitter(game.world.centerX, game.world.centerY, 250);
    emitter.makeParticles('ship', [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20], 200, true, true);
    emitter.start(false, 8000, 400);
    console.log("emitter", emitter);

    //  Game input
    cursors = game.input.keyboard.createCursorKeys();
    game.input.keyboard.addKeyCapture([ Phaser.Keyboard.SPACEBAR ]);
}

function update() {
    if (cursors.up.isDown){
        game.physics.arcade.accelerationFromRotation(sprite.rotation, 200, sprite.body.acceleration);
    } else {
        sprite.body.acceleration.set(0);
    }

    if (cursors.left.isDown) {
        sprite.body.angularVelocity = -300;
    } else if (cursors.right.isDown) {
        sprite.body.angularVelocity = 300;
    } else {
        sprite.body.angularVelocity = 0;
    }

    if (game.input.keyboard.isDown(Phaser.Keyboard.SPACEBAR)) {
        fireBullet();
    }

    screenWrap(sprite);
    bullets.forEachExists(screenWrap, this);
    
    game.physics.arcade.collide(emitter, sprite);
}

function fireBullet () {
    if (game.time.now > bulletTime) {
        bullet = bullets.getFirstExists(false);

        if (bullet) {
            bullet.reset(sprite.body.x + 16, sprite.body.y + 16);
            bullet.lifespan = 2000;
            bullet.rotation = sprite.rotation;
            game.physics.arcade.velocityFromRotation(sprite.rotation, 400, bullet.body.velocity);
            bulletTime = game.time.now + 50;
        }
    }
}

function screenWrap (sprite) {
    if (sprite.x < 0) {
        sprite.x = game.width;
    } else if (sprite.x > game.width) {
        sprite.x = 0;
    }

    if (sprite.y < 0) {
        sprite.y = game.height;
    } else if (sprite.y > game.height) {
        sprite.y = 0;
    }
}

function render() {
}