Tryit Editor v3.6

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<style>
canvas {
    border:1px solid #d3d3d3;
    background-color: #f1f1f1;
}
</style>
</head>
<body onload="startGame()">
<script>

var myGamePiece;
var myObstacle;

function startGame() {
    myGamePiece = new component(30, 30, "red", 10, 120);
    myObstacle  = new component(10, 200, "green", 300, 120);    
    myGameArea.start();
}

function updateGameArea() {
    myGameArea.clear();
    myObstacle.update();
    myGamePiece.newPos();    
    myGamePiece.update();
}

function moveup() {
    myGamePiece.speedY = -1; 
}

function movedown() {
    myGamePiece.speedY = 1; 
}

function moveleft() {
    myGamePiece.speedX = -1; 
}

function moveright() {
    myGamePiece.speedX = 1; 
}

function clearmove() {
    myGamePiece.speedX = 0; 
    myGamePiece.speedY = 0; 
}
</script>
<div style="text-align:center;width:480px;">
  <button onmousedown="moveup()" onmouseup="clearmove()" ontouchstart="moveup()">UP</button><br><br>
  <button onmousedown="moveleft()" onmouseup="clearmove()" ontouchstart="moveleft()">LEFT</button>
  <button onmousedown="moveright()" onmouseup="clearmove()" ontouchstart="moveright()">RIGHT</button><br><br>
  <button onmousedown="movedown()" onmouseup="clearmove()" ontouchstart="movedown()">DOWN</button>
</div>
<p>Now there is an obstacle in our gaming area, but still nothing happens when the red square hits it.</p>
</body>

</html>

​x
 
<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width, initial-scale=1.0"/><style>canvas {    border:1px solid #d3d3d3;    background-color: #f1f1f1;}</style></head><body onload="startGame()"><script>​var myGamePiece;var myObstacle;​function startGame() {    myGamePiece = new component(30, 30, "red", 10, 120);    myObstacle  = new component(10, 200, "green", 300, 120);        myGameArea.start();}​var myGameArea = {    canvas : document.createElement("canvas"),    start : function() {        this.canvas.width = 480;        this.canvas.height = 270;        this.context = this.canvas.getContext("2d");        document.body.insertBefore(this.canvas, document.body.childNodes[0]);        this.interval = setInterval(updateGameArea, 20);    },    clear : function() {        this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);    }}​function component(width, height, color, x, y) {    this.width = width;    this.height = height;    this.speedX = 0;    this.speedY = 0;        this.x = x;    this.y = y;        this.update = function() {

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