ADD TO Preloader.js :::

--preload
this.load.image('ghost', 'images/ghost.png');




ADD TO Game.js

-- ADD
makeGhost: function(b) {
    bunnyghost = this.add.sprite(b.x-20, b.y-180, 'ghost');
    bunnyghost.anchor.setTo(0.5, 0.5);
    bunnyghost.scale.x = b.scale.x
    this.physics.enable(bunnyghost, Phaser.Physics.ARCADE);
    bunnyghost.enableBody = true;
    bunnyghost.checkWorldBounds = true;
    bunnyghost.body.velocity.y = -800;
},


-- bunnyCollision
this.makeGhost(b);

-- friendlyFire
this.makeGhost(b);