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HTML 

              
                <div class="moon">
	<div class="crater"></div>
</div>

<div class="footprints">
	<span></span>
	<span></span>
	<span></span>
</div>

<div class="astronaut">

	<div class="backpack"></div>

	<div class="head">
		<div class="helmet"></div>
	</div>

	<div class="neck"></div>

	<div class="body"></div>

	<div class="arm right">
		<div class="top"></div>
		<div class="bot"></div>
		<div class="hand"></div>
	</div>

	<div class="arm left">
		<div class="top"></div>
		<div class="bot"></div>
		<div class="hand"></div>
	</div>

	<div class="leg right">
		<div class="top"></div>
		<div class="bot"></div>
		<div class="foot"></div>
	</div>

	<div class="leg left">
		<div class="top"></div>
		<div class="bot"></div>
		<div class="foot"></div>
	</div>

</div>
!

CSS 

              
                body {
	margin: 0;
	padding: 0;
	width: 100vw;
	height: 100vh;
	background: #080808;
	overflow: hidden;
	background-image: radial-gradient(1px 1px at 5% 98%, #ffffff, #fff0),
		radial-gradient(1px 1px at 18% 79%, #ffffff, #fff0),
		radial-gradient(2px 1px at 26% 52%, #ffffff, #fff0),
		radial-gradient(1px 2px at 31% 20%, #e6e6e6, #fff0),
		radial-gradient(1px 1px at 41% 44%, #e8e8e8, #fff0),
		radial-gradient(1px 2px at 47% 6%, #ffffff, #fff0),
		radial-gradient(1px 1px at 50% 71%, #f5f5f5, #fff0),
		radial-gradient(2px 1px at 65% 50%, #e2e2e2, #fff0),
		radial-gradient(1px 1px at 54% 26%, #ffffff, #fff0),
		radial-gradient(2px 2px at 79% 54%, #efefef, #fff0),
		radial-gradient(1px 1px at 10% 32%, #ececec, #fff0),
		radial-gradient(1px 2px at 84% 60%, #ffffff, #fff0),
		radial-gradient(1px 1px at 87% 13%, #eaeaea, #fff0),
		radial-gradient(1px 1px at 69% 21%, #efefef, #fff0),
		radial-gradient(1px 2px at 62% 83%, #efefef, #fff0),
		radial-gradient(2px 1px at 81% 74%, #efefef, #fff0),
		radial-gradient(1px 1px at 36% 62%, #efefef, #fff0),
		radial-gradient(1px 1px at 94% 68%, #efefef, #fff0),
		radial-gradient(2px 1px at 98% 50%, #efefef, #fff0),
		radial-gradient(1px 1px at 95% 21%, #efefef, #fff0),
		linear-gradient(45deg, #000 5%, #000313 65%, #111 100%);
	background-repeat: repeat;
	background-size: 25% 25%, 33.33% 33.33%, 50% 50%, 20% 20%, 33.33% 33.33%,
		25% 18%, 33.33% 19%, 33.33% 21%, 23% 27%, 27.33% 35.33%, 18.33% 32.33%,
		28.33% 34.33%, 33.33% 30.33%, 25.33% 29.33%, 29.33% 31.33%, 20.33% 29.33%,
		30.33% 27.33%, 22.33% 33.33%, 15.33% 32.33%, 33.33% 22.33%, 100% 100%;
}

*:before,
*:after {
	content: "";
	position: absolute;
}

body::before {
	width: 15vmax;
	height: 15vmax;
	background: radial-gradient(circle at 50% 100%, #000 0 50%, #fff0),
		radial-gradient(circle at 121% 39%, green 0 18%, #fff0 20%),
		radial-gradient(ellipse at 111% 26%, green 0 18%, #fff0 20%),
		radial-gradient(ellipse at 100% 15%, green 0 18%, #fff0 20%),
		radial-gradient(circle at 38% -15%, #ffffffb3 0 16%, #fff0 20%),
		radial-gradient(circle at 50% 100%, #000 0 50%, #008eff);
	border-radius: 100%;
	left: 10vmax;
	top: 10vmax;
	box-shadow: 0 -0.5vmax 1vmax -0.25vmax #9999ff45;
}

.moon {
	position: absolute;
	width: 250vmax;
	height: 100vmax;
	z-index: 1;
	border-radius: 100%;
	background: radial-gradient(
			circle at 50% 50%,
			#fdfdfd 0% 5vmax,
			#ffffff00 10vmax 100%
		),
		#fff;
	box-shadow: 0 0 10vmax 1vmax #6493a9, 0 0 5vmax 5vmax #adadad80 inset,
		0 0 2vmax 1vmax #fdfdfd;
	left: calc(50% - 125vmax);
	top: 45vmax;
}

.moon:before {
	content: "";
	background: radial-gradient(
		circle at 100% 60%,
		#ffffff00 0% 60%,
		#dddddd 75% 100%
	);
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0%;
	left: 0%;
	border-radius: 100%;
}

.crater {
	content: "";
	position: absolute;
	width: 25vmax;
	height: 20vmax;
	border-radius: 100%;
	transform: rotateX(50deg) rotateY(-10deg) rotateZ(15deg);
	border: 1px dotted #404040;
	background: linear-gradient(225deg, #000000, #eaeaea99);
	box-shadow: 0 0 3vmax 1vmax #585858, 0 0 0.5vmax 0.5vmax #5d5d5d,
		2vmax 5vmax 5.5vmax 3.5vmax #484848, 0 0 5vmax 0.5vmax #444444,
		1vmax 3.5vmax 1.5vmax 0.5vmax #ababab;
	left: calc(50% - 25vmax);
	opacity: 0.35;
	bottom: calc(50% + 25vmax);
}

/*** ASTRONAUT ***/

.astronaut {
	width: 20vmax;
	height: 30vmax;
	right: -20vmax;
	position: absolute;
	top: 30vmax;
	z-index: 2;
	animation: walk-left 20s cubic-bezier(0.05, -0.01, 0.61, 0.99) 0s infinite,
		walk-up 5s cubic-bezier(0.35, 0.14, 1, 1) 1.5s infinite;
	margin-top: -10%;
}

@keyframes walk-left {
	0% {
		right: -20%;
	}
	20% {
		right: 10%;
	}
	45% {
		right: 40%;
	}
	70% {
		right: 70%;
	}
	100% {
		right: 100%;
	}
}

@keyframes walk-up {
	0%,
	100% {
		top: 30vmax;
	}
	20%,
	80% {
		top: 31vmax;
	}
	50% {
		top: 35vmax;
	}
}

.astronaut * {
	position: absolute;
}

.astronaut:before {
	background: #8a8a8a85;
	width: 13vmax;
	height: 7vmax;
	top: 105%;
	left: 22%;
	border-radius: 100%;
	filter: blur(10px);
	animation: shadow 5s cubic-bezier(0.35, 0.14, 1, 1) 1.5s infinite;
	opacity: 0.35;
}

@keyframes shadow {
	0%,
	100% {
		top: 105%;
		left: 25%;
	}
	20%,
	80% {
		top: 100%;
		left: 23%;
	}
	50% {
		top: 85%;
		left: 22%;
		height: 3vmax;
	}
}

.backpack {
	background: linear-gradient(
		91deg,
		#343535 0% 55%,
		#4b4e50 58% 75%,
		#6e7071 77% 88%,
		#c6c6c6 92% 100%
	);
	width: 30%;
	height: 38%;
	left: 57%;
	top: 20%;
	border-radius: 10% 17% 60% 10%;
	border-top: 0.2vmax solid #4b4e50;
}

.head {
	background: #b8b8b8;
	width: 46%;
	height: 27%;
	border-radius: 50%;
	left: 31%;
	top: 4%;
	border-bottom: 1vmax solid #9b9b9b;
	transform: rotate(-4deg);
	z-index: 3;
}

.head:before {
	width: 75%;
	height: 69%;
	border-radius: 50% 50% 0 0;
	left: 9%;
	top: 3%;
	border-top: 0.65vmax solid #c6c6c6;
	border-right: 0.15vmax solid transparent;
	border-left: 0.15vmax solid transparent;
	transform: rotate(9deg);
}

.head:after {
	background: radial-gradient(
		circle at 45% 25%,
		#2b2b2b 0 57%,
		#252525 58% 100%
	);
	width: 80%;
	height: 83%;
	border-radius: 50%;
	left: 5%;
	top: 13%;
	border: 0.25vmax solid #000;
	box-sizing: border-box;
}

.helmet {
	background: radial-gradient(circle at 8% 33%, #343434 0 5%, #fff0 6% 100%),
		radial-gradient(circle at 94% 42%, #343434 0 5%, #fff0 6% 100%),
		radial-gradient(circle at 25% 75%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 35% 70%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 45% 67%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 55% 69%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 65% 77%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 75% 87%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 85% 96%, #2b2b2b 0 35%, #fff0 36% 100%),
		radial-gradient(circle at 96% 49%, #2b2b2b 0 5%, #fff0 6% 100%),
		radial-gradient(circle at 4% 40%, #2b2b2b 0 5%, #fff0 6% 100%);
	width: 50%;
	height: 50%;
	border-radius: 100%;
	z-index: 3;
	left: 15%;
	top: 22%;
	transform: rotate(-16deg);
	color: #343434;
	color: #5d5d5d;
	background-color: #343434;
}

.helmet:before {
	background: #343434;
	width: 98%;
	height: 36%;
	border-radius: 100%;
	left: 2%;
	top: 25%;
	transform: rotate(5deg);
}

.helmet:after {
	background: #5d5d5d;
	width: 18%;
	height: 16%;
	border-radius: 100%;
	left: 58%;
	top: 14%;
	transform: rotate(27deg);
	box-shadow: -1.15vmax 0.35vmax 0vmax -0.2vmax #7a7a7a,
		-1.05vmax 0.25vmax 0vmax -0.2vmax #7a7a7a;
}

.neck {
	background: radial-gradient(
		circle at 43.95% 15%,
		transparent 0 61%,
		#666b6e 62% 100%
	);
	width: 48%;
	height: 10%;
	top: 17%;
	left: 30%;
	border-radius: 50% 50% 100% 100%;
	transform: rotate(3deg);
	z-index: 3;
}

.body {
	background: radial-gradient(
		circle at 50% -75%,
		#c6c6c6 0 80%,
		#5f5f5f 81% 85%,
		#c6c6c6 86% 100%
	);
	width: 45%;
	height: 30%;
	left: 32%;
	top: 31%;
	border-radius: 19% 23% 34% 37%;
	transform: rotate(-1deg);
	z-index: 2;
	border-right: 2vmax solid #888d90;
	box-sizing: border-box;
	border-bottom: 1vmax solid #888d90;
}

.body:before {
	background: radial-gradient(ellipse at 38% 65%, #888d90 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 33% 65%, #888d90 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 28% 65%, #888d90 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 38% 30%, #666b6e 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 33% 30%, #666b6e 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 28% 30%, #666b6e 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 41% 69%, #555555 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 33% 69%, #555555 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 28% 69%, #555555 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 41% 34%, #444444 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 33% 34%, #444444 0 13%, #fff0 15% 100%),
		radial-gradient(ellipse at 28% 34%, #444444 0 13%, #fff0 15% 100%),
		radial-gradient(circle at 74% 30%, #f50000 0 10%, #fff0 12% 100%),
		radial-gradient(circle at 74% 65%, #4562ff 0 10%, #fff0 12% 100%),
		radial-gradient(circle at 76% 32%, #790000 0 10%, #fff0 12% 100%),
		radial-gradient(circle at 76% 67%, #06166f 0 10%, #fff0 12% 100%), #d7d7d7;
	width: 65%;
	height: 44%;
	border-radius: 20%;
	top: 15%;
	left: 19%;
	transform: rotate(3deg);
	border-right: 0.35vmax solid #b1b1b1;
	border-bottom: 0.35vmax solid #adadad;
	border-left: 0.1vmax solid #b8b8b8;
	border-top: 0.15vmax solid #b8b8b8;
	box-sizing: border-box;
}

/*** ARMS ***/

.arm {
	width: 40%;
	height: 18%;
	top: 25%;
	transform-origin: right center;
}

.arm.right {
	z-index: 0;
	left: -5%;
	transform: rotate(20deg);
	top: 27%;
	animation: arm-right 20s ease-out 0s infinite;
}

@keyframes arm-right {
	0% {
		transform: rotate(5deg);
	}
	20% {
		transform: rotate(-95deg);
	}
	45% {
		transform: rotate(5deg);
	}
	70% {
		transform: rotate(-95deg);
	}
	100% {
		transform: rotate(5deg);
	}
}

.arm.left {
	left: 31%;
	transform: rotate(-145deg);
	top: 28%;
	z-index: 4;
	animation: arm-left 20s ease-out 0s infinite;
}

@keyframes arm-left {
	0% {
		transform: rotate(-145deg);
	}
	20% {
		transform: rotate(-45deg);
	}
	45% {
		transform: rotate(-145deg);
	}
	70% {
		transform: rotate(-45deg);
	}
	100% {
		transform: rotate(-145deg);
	}
}

.arm .top {
	background: #0000ff70;
	width: 55%;
	height: 45%;
	right: 0;
	top: 33%;
	transform-origin: right center;
	transform: rotate(-13deg);
	border-radius: 40%;
	background: linear-gradient(-3deg, #888d90 0 40%, #c6c6c6 43% 100%);
}

.arm .bot {
	width: 55%;
	height: 45%;
	top: 53%;
	left: 15%;
	transform-origin: right center;
	transform: rotate(25deg);
	border-radius: 40%;
	background: radial-gradient(circle at 100% 51%, #888d90 0 7%, #fff0 8% 100%),
		linear-gradient(-3deg, #888d90 0 40%, #c6c6c6 43% 100%);
}

.arm > div:before {
	background: #666b6e;
	height: 1.75vmax;
	width: 1vmax;
	right: 5%;
	border-radius: 80% 70% 35% 30%;
	transform: rotate(-15deg);
	top: -20%;
}

.arm > div:after {
	background: #666b6e;
	height: 1.5vmax;
	width: 1vmax;
	top: 40%;
	right: 1%;
	transform: rotate(0deg);
	border-radius: 30% 30% 80% 70%;
}

.arm.right .top:before {
	transform: rotate(10deg);
	right: -2%;
	height: 1.5vmax;
	top: -3%;
}

.arm.left .top:before {
	transform: rotate(-2deg);
	left: 78%;
	right: 1%;
	top: -10%;
}

.arm.left .top:after {
	top: 45%;
	right: -1%;
	width: 21%;
}

/*** HANDS ***/

.hand {
	background: #888d90;
	width: 33%;
	height: 53%;
	border-radius: 55%;
	top: 19%;
	transform: rotate(22deg);
	left: 2%;
}

.hand:before {
	top: -5% !important;
	right: -0.25vmax !important;
	transform: rotate(-5deg) !important;
}

.hand:after {
	top: 45% !important;
	right: -0.3vmax !important;
	transform: rotate(-5deg) !important;
}

/*** LEGS ***/

.leg {
	width: 25%;
	height: 36%;
	top: 54%;
	left: 28%;
	transform-origin: center top;
}

.leg.right {
	animation: leg-right 20s ease-out 0s infinite;
}

@keyframes leg-right {
	0% {
		transform: rotate(-45deg);
	}
	20% {
		transform: rotate(10deg);
	}
	45% {
		transform: rotate(-45deg);
	}
	70% {
		transform: rotate(10deg);
	}
	100% {
		transform: rotate(-45deg);
	}
}

.leg.left {
	transform: rotate(-30deg);
	animation: leg-left 20s ease-out 0s infinite;
	transform-origin: 70% top;
	left: 45%;
	transform: rotate(-25deg);
	top: 56%;
	z-index: 2;
}

@keyframes leg-left {
	0% {
		transform: rotate(15deg);
	}
	20% {
		transform: rotate(-30deg);
	}
	45% {
		transform: rotate(15deg);
	}
	70% {
		transform: rotate(-30deg);
	}
	100% {
		transform: rotate(15deg);
	}
}

.leg .top,
.leg .bot {
	width: 75%;
	height: 32%;
	left: -16%;
	top: -5%;
	transform-origin: right center;
	transform: rotate(-79deg);
	border-radius: 25% 10% 10% 25%;
	background: linear-gradient(-3deg, #888d90 0 65%, #c6c6c6 67% 100%);
}

.leg .bot {
	top: 25%;
	transform: rotate(-97deg);
	left: -28%;
	height: 31%;
}

.leg > div:before {
	background: #666b6e;
	height: 65%;
	width: 1vmax;
	right: -5%;
	border-radius: 80% 70% 35% 30%;
	transform: rotate(25deg);
	top: -6%;
}

.leg > div:after {
	background: #666b6e;
	height: 65%;
	width: 1vmax;
	top: 40%;
	right: 1%;
	transform: rotate(-10deg);
	border-radius: 30% 30% 80% 70%;
}

/*** FEET ***/

.foot {
	background: linear-gradient(45deg, #888d90 0 55%, #c6c6c6 60% 100%);
	width: 55%;
	height: 45%;
	bottom: -10%;
	transform: rotate(-99deg);
	border-radius: 25% 55% 30% 30%;
	left: 20%;
	border-left: 0.65vmax solid #505050;
	box-sizing: border-box;
}

.foot:before {
	height: 50% !important;
	left: 78%;
	top: 22% !important;
	transform: rotate(13deg) !important;
}

.foot:after {
	height: 50% !important;
	left: 70%;
	top: 52% !important;
	transform: rotate(-5deg) !important;
	border-radius: 83% 25% 80% 70% !important;
}

.footprints {
	width: 100%;
	height: 15vmax;
	position: absolute;
	top: 50vmax;
	z-index: 1;
}

.footprints span {
	width: 4.5vmax;
	height: 2vmax;
	position: absolute;
	left: 74%;
	top: 2%;
	border-radius: 40% 30% 30% 40%;
	transform: rotateX(20deg) rotateZ(-2deg);
	background: repeating-linear-gradient(
		90deg,
		#c3c3c3 0 0.5vmax,
		#bdbdbd 0 1vmax
	);
	filter: blur(1px);
	opacity: 0.5;
	opacity: 0;
	animation: footprint 20s linear 0s infinite;
}

.footprints span + span {
	animation-delay: 5s;
	left: 45.75%;
	top: 3%;
}

.footprints span + span + span {
	animation-delay: 10s;
	left: 14.05%;
	top: 2%;
}

@keyframes footprint {
	0% {
		opacity: 0;
	}
	20% {
		opacity: 0;
	}
	21% {
		opacity: 0.5;
	}
	50% {
		opacity: 0.5;
	}
	100% {
		opacity: 0;
	}
}
!

JS
!
999px

Console