JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/phaser/2.1.3/phaser.min.js"></script>

JavaScript

var WIDTH = 320;
var HEIGHT = 480;
var CONTACT = false;
var blobSize = 20;
var circObj = new Phaser.Circle(0, 0, blobSize);

var game = new Phaser.Game(WIDTH, HEIGHT, Phaser.CANVAS, "", {init: init, preload: preload, create: create, render: render}, false, true);

function init() {
    this.stage.backgroundColor = 0xFAFAFF;
    // center the game
    this.scale.pageAlignHorizontally = true;
    this.scale.pageAlignVertically = true;
    this.scale.refresh();
}
function preload(game) {
    game.physics.startSystem(Phaser.Physics.P2JS);
}

function create(game) {
    spacebar = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);
    game.world.setBounds(0, 100, game.world.width, 400);

    var circle = game.add.graphics();
    circle.lineStyle(0);
    circle.beginFill(0xff0000, 1);
    circle.drawShape(circObj);
    // Add our blob
    blob = game.add.sprite(game.world.centerX, game.world.bounds.bottom - blobSize);
    game.physics.p2.enable(blob);
    // Add the graphics as a child to the blob
    blob.addChild(circle);
    // Make sure the body is the same shape as our cirlce
    blob.body.setCircle(blobSize);
    // Add a target
    target = game.add.sprite(game.world.centerX, game.world.centerY);
    game.physics.p2.enable(target);
    // Make sure the blob is the same size as the ring
    var ring = game.add.graphics();
    ring.lineStyle(2, 0x000000, 0.25);
    ring.drawCircle(0, 0, 50);
    
    target.addChild(ring);
    target.body.setCircle(50, 0, 0);
    target.body.kinematic = true;
    
    // When the spacebar is pressed, the blob should move upwards
    spacebar.onDown.add(function() {
        blob.body.velocity.y = -150;
    }, this);
    
    // Update the contact variable when the blob touches the ring
    blob.body.onBeginContact.add(function (){
        CONTACT = true;
    });
    
}

function render(game) {
    target.body.debug = true;
    blob.body.debug = true;
    if (CONTACT) {
        game.debug.text("CONTACT!", 25, 25, "#000000");
    ...