JSFiddle - React, Tailwind, and code Playground

CSS

/**************************************************
	GAME
**************************************************/
section.game {
	padding: 40px 0px;
}

.SplashScreen, .FinishScreen {
	margin: 0 auto;
	text-align:center;
	width: 450px;
	height: 450px;
	border: 2px solid #fff;
	background-color:#0056a0;
}

.FinishScreen h1,
.SplashScreen h1 {
	color: #fff200;
	font-family: 'Oswald', sans-serif;
	font-size: 36px;
	font-weight: 700;
	margin: 0px 0px 10px;
	padding: 50px 0px 0px;
	text-align: center;
	text-transform: uppercase;
}

.FinishScreen p {
	color: #fff;
	font-weight: bold;
}

.FinishScreen h2,
.SplashScreen h2 {
	color: #ffffff;
	font-family: 'Oswald', sans-serif;
	font-size: 28px;
	font-weight: 700;
	margin: 0px 0px 25px;
	text-align: center;
}

canvas {
	border: 2px solid #fff;
	margin: 0 auto;
	display: block;
}

#gamecontainer {
	background: red;
	width:450px;
	height:450px;
	border: 2px solid #fff;
	margin: 0 auto;
}

.gamelayer {
	width:450px;
	height:450px;
	position:absolute;
	display:none;
}

input.StartButton {
	color: #fff200;
	font-size: 16px;
	display: block;
	width: 200px;
	height: 40px;
	background-color: #0056a1;
	border: 2px solid #fff200;
	text-align: center;
	margin: 0 auto;
	-webkit-transition: all 0.2s ease-in-out;
	   -moz-transition: all 0.2s ease-in-out;
	     -o-transition: all 0.2s ease-in-out;
	        transition: all 0.2s ease-in-out;
}

input.StartButton:hover {
	color: #0056a1;
	font-size: 16px;
	display: block;
	width: 200px;
	height: 40px;
	background-color: #fff;
	border: 2px solid #0056a1;
}

input.StartButton:focus {
	outline-color: transparent;
	outline-style: none;
}

.button-pad {
	margin:10px 0px 0px 200px;
	position: relative;
}

.button-pad button {
	background-color:transparent; 
	border-color:transparent;
	height: 50px;
	width: 50px;
    margin: 0px;
    padding: 0px;
}

.button-pad .btn-up {
	position: relative;
	top: 0px;
}

.button-pad .btn-right {
	position: relative;
	right: -40px;
	top: -10px;
}

.button-pad...