Phaser 2.0 Tutorial: Flappy Bird (Part 2) : Full tutorial: http://codevinsky.ghost.io/phaser-2-0-tutorial-flappy-bird-part-2/

Bird.js

/* Full tutorial: http://codevinsky.ghost.io/phaser-2-0-tutorial-flappy-bird-part-2/ */
'use strict';

var Bird = function(game, x, y, frame) {
  Phaser.Sprite.call(this, game, x, y, 'bird', frame);
  this.anchor.setTo(0.5, 0.5);
  
  // add flap animation and begin playing it
  this.animations.add('flap');
  this.animations.play('flap', 12, true);
  

  // enable physics on the bird
  this.game.physics.arcade.enableBody(this);
  
};

Bird.prototype = Object.create(Phaser.Sprite.prototype);
Bird.prototype.constructor = Bird;

Bird.prototype.update = function() {
};

module.exports = Bird;

Ground.js

/* Full tutorial: http://codevinsky.ghost.io/phaser-2-0-tutorial-flappy-bird-part-2/ */
'use strict';

var Ground = function(game, x, y, width, height) {
  Phaser.TileSprite.call(this, game, x, y, width, height, 'ground');
  // start scrolling our ground
  this.autoScroll(-200,0);
  
  // enable physics on the ground sprite
  // this is needed for collision detection
  this.game.physics.arcade.enableBody(this);
      
  // we don't want the ground's body
  // to be affected by gravity or external forces
  this.body.allowGravity = false;
  this.body.immovable = true;


};

Ground.prototype = Object.create(Phaser.TileSprite.prototype);
Ground.prototype.constructor = Ground;

Ground.prototype.update = function() {
  
  // write your prefab's specific update code here
  
};

module.exports = Ground;

play.js

/* Full tutorial: http://codevinsky.ghost.io/phaser-2-0-tutorial-flappy-bird-part-2/ */
  'use strict';
  function Play() {}
  Play.prototype = {
    create: function() {
      // start the phaser arcade physics engine
      this.game.physics.startSystem(Phaser.Physics.ARCADE);

      // give our world an initial gravity of 500
      this.game.physics.arcade.gravity.y = 500;

      // add the background sprite
      this.background = this.game.add.sprite(0,0,'background');

      // create and add a new Bird object
      this.bird = new Bird(this.game, 100, this.game.height/2);
      this.game.add.existing(this.bird);
      
      // create and add a new Ground object
      this.ground = new Ground(this.game, 0, 400, 335, 112);
      this.game.add.existing(this.ground);
    },
    update: function() {
      // enable collisions between the bird and the ground
      this.game.physics.arcade.collide(this.bird, this.ground);
    }
  };

  module.exports = Play