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

function preload() {

    game.load.image('ball', 'assets/sprites/shinyball.png');

}

var sprite;

function create() {

    sprite = game.add.sprite(game.world.centerX, game.world.centerY, 'ball');

}

function update() {

    //  only move when you click
    if (game.input.mousePointer.isDown)
    {
        //  400 is the speed it will move towards the mouse
        game.physics.moveToPointer(sprite, 400);

        //  if it's overlapping the mouse, don't move any more
        if (Phaser.Rectangle.contains(sprite.body, game.input.x, game.input.y))
        {
            sprite.body.velocity.setTo(0, 0);
        }
    }
    else
    {
        sprite.body.velocity.setTo(0, 0);
    }

}