Вот код на jsfiddle, там почему-то jquery не хочет подключаться.
https://jsfiddle.net/CitizenOne/m4cd5n79/1/
Ну а вот сам код. Надо что бы при повторном клике на клетку цвет исчезал.
<!DOCTYPE html>
<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>Game For Yan</title>
<script src="jquery-3.2.1.min.js"></script>
<script src="jquery-ui.min.js"></script>
<script>
$(document).ready(function(){
$('#game').hide();
$('#start').click(function(){
$(this).hide();
$('.menu').hide();
$('#game').slideDown(300);
$('.play').hide();
});
var color;
$('#colors div').click(function(){
color = $(this).attr('class');
$('#colors div').removeClass('checked');
$(this).addClass('checked');
});
$('table').on('click', 'td', function(){
$(this).removeClass(color);//Внимание сюда
$(this).toggleClass(color);
});
$('.lol').mouseover(function(){
$('td').removeClass();
});
$('.clean').click(function(){
$('td').removeClass();
});
});
</script>
<style>
body{
margin:0;
font-family:Arial, Helvetica, sans-serif;
background:url('img/bg.jpg');
}
#start{
width:500px;
height:50px;
cursor:pointer;
color:white;
border-radius:50px;
transition:0.3s;
border:6px white solid;
background-color:#0099FF;
position:absolute;
left:750px;
top:80px;
text-align:center;
font-size:30px;
}
#start:hover{
background-color:#3366CC;
}
#start p{
margin:0;
padding-top:7px;
}
.play{
width:100%;
height:250px;
background-color:#333333;
margin-top:50px;
position:relative;
}
table{
margin:0 auto;
border-collapse: collapse;
}
td{
border:3px #333333 solid;
cursor:pointer;
margin:5px;
background-color:white;
height:80px;
width:80px;
}
#colors{
margin:0 auto;
margin-top:30px;
width:100%;
background-color:#333333;
padding:15px 0 15px 15px;
text-align:center;
position: relative;
}
#colors > div{
width:50px;
height:50px;
display:inline-block;
margin-right:15px;
cursor:pointer;
}
#colors p{
color:white;
margin:0;
margin-top:15px;
font-size:20px;
}
/********************СOLORS********************/
.blue{
background-color:#FFCCFF;
}
.red{
background-color:red;
}
.yellow{
background-color:#FFFF33;
}
.white{
background-color:#FFFFFF;
}
.green{
background-color:#999933;
}
.gray{
background-color:#999999;
}
.red{
background-color:#FF0000;
}
.black{
background-color:#000000;
}
.yan{
background-image:url('colors/yan.jpg');
}
.yel{
background-image:url('colors/yel.jpg');
}
.car{
background-image:url('colors/car.jpg');
}
/********************СOLORS********************/
.clean{
width:150px;
height:50px;
background-color:#0099FF;
cursor:pointer;
color:white;
text-align:center;
border-radius:50px;
transition:0.3s background-color;
display: inline-block;
position: absolute;;
}
.clean:hover{
background-color:#3366CC;
}
.clean p{
margin:0;
}
.checked{
border-bottom: 6px white solid;
}
h1{
text-align:center;
background-color:#333333;
color:white;
padding:15px 0 15px 0;
}
.video{
width:1690px;
margin:0 auto;
}
</style>
</head>
<body>
<div class="play">
<div id="start"><p>Рисовать!</p></div>
</div>
<div class="menu">
<h1>МУЛЬТИКИ</h1>
<div class="video">
<iframe width="560" height="315" src="https://www.youtube.com/embed/T4twqnmPjpQ" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/2ZdNT4VwKuM" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/sajgcqs1xio" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/TiX-6A2Cn30" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/7OHMqdMpsj8" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/4IfmzhwzPVM" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/4SJ6SNiXcOw" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/bR-fdVxHO8M" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/z-bTLD7fESY" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/n_YRqcIN2-0" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/-L7xUFmNzYs" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/YnltFSl_DQ0" frameborder="0" allowfullscreen></iframe>
</div>
</div>
<div id="game">
<h1>Игра для Яна</h1>
<table cellspacing="0">
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</table>
<div id="colors">
<div class="white"></div>
<div class="red"></div>
<div class="blue"></div>
<div class="yellow"></div>
<div class="green"></div>
<div class="blue"></div>
<div class="gray"></div>
<div class="black"></div>
<div class="yan"></div>
<div class="yel"></div>
<div class="car"></div>
<article class="clean"><p>Отчистить</p></article>
<p>Выбери цвет!</p>
</div>
</div>
</body>
</html>