JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/phaser-ce/2.10.0/phaser.js"></script>

JavaScript

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

var player;
var platforms;
var cursors;
var jumpButton;

function preload() {

    game.stage.backgroundColor = '#85b5e1';

    game.load.baseURL = 'http://examples.phaser.io/assets/';
    game.load.crossOrigin = 'anonymous';

    game.load.image('player', 'sprites/phaser-dude.png');
    game.load.image('platform', 'sprites/platform.png');
    game.load.image('platform2', 'sprites/platform.png');
}

function create() {

    player = game.add.sprite(100, 100, 'player');

    game.physics.arcade.enable(player);

    player.body.collideWorldBounds = true;
    player.body.gravity.y = 500;

    platforms = game.add.physicsGroup();
    platforms.create(-100, 200, 'platform');


    platforms.setAll('body.immovable', true);

    cursors = game.input.keyboard.createCursorKeys();
    jumpButton = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);

}

function update () {

    game.physics.arcade.collide(player, platforms);
    platforms.angle = 20;
    player.body.velocity.x = 0;

    if (cursors.left.isDown)
    {
        player.body.velocity.x = -250;
    }
    else if (cursors.right.isDown)
    {
        player.body.velocity.x = 250;
    }

    if (jumpButton.isDown && (player.body.onFloor() || player.body.touching.down))
    {
        player.body.velocity.y = -400;
    }
}