Basic Babylonjs Physics Scenes with Controls

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>BABYLON.JS Basic Physics Scene</title>

    <script src="babylon.js"></script>
    <script src="cannon.js"></script>

    <style type="text/css">
        html,body,#canvas {
            width:100%;
            height:100%;
            padding:0;
            margin:0;
            overflow: hidden;
        }
        #buttons{
            position: absolute;
            top: 0px;
            left: 0px;
        }
    </style>
</head>
<body>
    <canvas id="canvas"></canvas>
    <div id="buttons">
      <div id="ball_controls">
        <button id="button_up" onclick="Ball_Move(0,20,0)">UP</button>
        <button id="button_left" onclick="Ball_Move(-1,0,0)">LEFT</button>
        <button id="button_right" onclick="Ball_Move(1,0,0)">RIGHT</button>
        <button id="button_forward" onclick="Ball_Move(0,0,1)">Forward</button>
        <button id="button_back" onclick="Ball_Move(0,0,-1)">Back</button>
      <div>

      <div id="box_controls">
        <button id="button_up" onclick="Box_Move(0,1,0)">UP</button>
        <button id="button_left" onclick="Box_Move(-.5,0,0)">LEFT</button>
        <button id="button_right" onclick="Box_Move(.5,0,0)">RIGHT</button>
        <button id="button_forward" onclick="Box_Move(0,0,.5)">Forward</button>
        <button id="button_back" onclick="Box_Move(0,0,-.5)">Back</button>
      <div>

    </div>
<script>

var scene, camera, light0, ball, plane;
window.onload = function(){
    var canvas = document.getElementById("canvas");

    // Check support
    if (!BABYLON.Engine.isSupported()) {
        window.alert('Browser not supported');
    } else {
        // Babylon
        var engine = new BABYLON.Engine(canvas, true);

        scene = new BABYLON.Scene(engine);
        scene.enablePhysics();
        scene.setGravity(new BABYLON.Vector3(0, -10, 0));
        // Creating a camera looking to the zero point (0,0,0), a light, and a sphere of size 1
        //camera = new BABYLON.FreeCamera("Camera", 1, 0.8, 10, scene);
        camera = new BABYLON.FreeCamera("FreeCamera", new BABYLON.Vector3(-10, -10, -15), scene);

        light0 = new BABYLON.PointLight("Omni", new BABYLON.Vector3(0, 0, -20), scene);

        ball = BABYLON.Mesh.CreateSphere("Ball", 10, 5.0, scene);
        ball.position.y = 5;
        ball.setPhysicsState({ impostor: BABYLON.PhysicsEngine.SphereImpostor, mass: 1 });
        camera.lockedTarget = ball;

        box = BABYLON.Mesh.CreateBox("Box", 3, scene);
        box.position.x = 5;
        box.position.z = 5;
        box.setPhysicsState({ impostor: BABYLON.PhysicsEngine.BoxImpostor, mass: 1, friction: 0.5, restitution: 0.7 });

        plane = BABYLON.Mesh.CreatePlane("Plane", 200.0, scene);
        plane.position.y = -30;
        plane.rotate(BABYLON.Axis.X, Math.PI/2, BABYLON.Space.LOCAL);
        plane.setPhysicsState({ impostor: BABYLON.PhysicsEngine.BoxImpostor, mass: 0, friction: 0.5, restitution: 0.7 });

        // Attach the camera to the scene
        scene.activeCamera.attachControl(canvas);

        // Once the scene is loaded, just register a render loop to render it
        engine.runRenderLoop(function () {
            scene.render();
        });

        // Resize
        window.addEventListener("resize", function () {
            engine.resize();
        });
    }
};

function Ball_Move(x,y,z){
    camera.lockedTarget = ball;
    ball.applyImpulse(new BABYLON.Vector3(x, y, z),0);
}

function Box_Move(x,y,z){
    camera.lockedTarget = box;
    box.applyImpulse(new BABYLON.Vector3(x, y, z),0);
}

</script>
</body>
</html>