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CSS

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HTML 

              
                .main-content
	.title 
		span 
			| 2018 End of the year Bingo
		span 2018 End of the year Checklist
	.bingo-card
		each val, index in ['tried & failed to give up an unhealthy habit','Participated in a marriage proposal','Went on a Tinder date', 'Made a post about Stan Lee', ' Mocked trump & his tweets','came up with an app idea & did nothing','spent >$800 on coffee','predicted a game of thrones event','thought of getting a pet','"you know, Thanos has a point!"','Went soul searching but you\'re still lost','became a fan of a Winter Olympian','free space','accidentally walked into an mlm convo','invested in crypto','flossed before your dental visit','tuned into the royal wedding','watched all marvel movies before the Avengers','"ugh, my mom is on facebook!"','got passionately angry when brooklyn 99 got axed','binged on red dead redemption 2','got told you should go vegan','deleted tinder','achieved none of your NY resolutions','already made resolutions for 2019']
			.bingo-card__item= val
				span.bingo-card__checkbox

aside.context
	.clear-button Clear board
	.explanation
		| Part of the 
		a(href="https://codepen.io/collection/DQvYpQ" target="_blank") CSS Grid collection here
		| .

footer
	a(href="https://twitter.com/meowlivia_" target="_blank")
		i.icon-social-twitter.icons
	a(href="https://github.com/oliviale" target="_blank")
		i.icon-social-github.icons
	a(href="https://dribbble.com/oliviale" target="_blank")
		i.icon-social-dribbble.icons
!

CSS 

              
                $yellow-light: #f9f59e;
$yellow: #fbda7d;
$yellow-dark: #f7d75c;
$orange: #fdb90b;
$orange-dark: #f2ae00;
$brown: #dd8a34;

* {
	box-sizing: border-box;
}

body {
	background: #f8f8f8;
	font-family: "Nunito", sans-serif;
}

aside.context {
	text-align: center;
	color: #333;
	line-height: 1.7;
	a {
		text-decoration: none;
		color: #333;
		padding: 3px 0;
		border-bottom: 1px dashed;
		&:hover {
			border-bottom: 1px solid;
		}
	}
	.explanation {
		max-width: 700px;
		margin: 4em auto 0;
	}
}

footer {
	text-align: center;
	margin: 3em auto;
	width: 100%;
	a {
		text-decoration: none;
		display: inline-block;
		width: 45px;
		height: 45px;
		border-radius: 50%;
		background: transparent;
		border: 1px dashed #333;
		color: #333;
		margin: 5px;
		&:hover {
			background: rgba(255, 255, 255, 0.1);
		}
		.icons {
			margin-top: 12px;
			display: inline-block;
			font-size: 20px;
		}
	}
}

.main-content {
	max-width: 600px;
	width: 100%;
	margin: 4em auto 0;
	overflow: hidden;
}

.title {
	background: $orange;
	color: #fff;
	padding: 30px 10px;
	grid-column: span 5;
	text-align: center;
	font: 72px/0.9 "Amatic SC", cursive;
	span {
		display: none;
		&:nth-child(1) {
			display: block;
		}
		@media screen and (max-width: 600px) {
			&:nth-child(1) {
				display: none;
			}
			&:nth-child(2) {
				display: block;
			}
		}
	}
}

.bingo-card {
	background: $yellow-dark;
	padding: 10px;
	display: grid;
	grid-gap: 3px;
	grid-template-rows: repeat(5, 110px);
	grid-template-columns: repeat(5, 1fr);
	text-transform: uppercase;
	&__item {
		background: $yellow-light;
		display: flex;
		align-items: center;
		text-align: center;
		justify-content: center;
		position: relative;
		cursor: pointer;
		font-size: 12px;
		line-height: 1.35;
		user-select: none;
		&:after {
			content: "-";
			position: absolute;
			top: -28%;
			left: -30%;
			color: $yellow;
			width: 100%;
			opacity: 0;
			transition: 0.1s ease;
			height: 0;
			pointer-events: none;
			font: 280px/0.5 "Caveat Brush", cursive;
			text-align: center;
			transform: rotate(-45deg);
		}
		&.active:after {
			height: 100%;
			opacity: 0.7;
		}
	}
}

.bingo-card {
	&__item {
		padding: 15px;
		&.active .bingo-card__checkbox:before {
			content: "\2714";
			position: absolute;
			color: black;
			left: 0;
			top: -19px;
			color: $orange;
			font: 30px "Caveat Brush", cursive;
		}
	}
	&__checkbox {
		display: none;
	}
}

.clear-button {
	margin: 2em 0 0;
	font: 700 16px 'Nunito', sans-serif;
	text-transform: uppercase;
	cursor: pointer;
	display: inline-block;
	border: 2px dotted;
	color: $orange;
	padding: 8px 10px;
	&:hover {
		color: $orange-dark;
	}
}

@media screen and (max-width: 600px) {
	.main-content {
		max-width: none;
		margin: 0;
	}
	.title {
		font: 50px/0.9 "Amatic SC", cursive;
		padding: 20px;
	}
	.bingo-card {
		grid-template-rows: repeat(24, auto);
		grid-template-columns: auto;
		margin: 1em;
	}
	.bingo-card__item {
		justify-content: flex-start;
		padding: 15px 15px 15px 40px;
		text-align: left;
		&:after {
			content: "";
			opacity: 0;
		}
		&:nth-child(13) {
			display: none;
		}
	}
	.bingo-card__checkbox {
		display: inline;
		position: absolute;
		width: 20px;
		height: 20px;
		left: 10px;
		border: 2px dashed $yellow-dark;
	}
}
!

JS 

              
                $(".bingo-card__item").on('click', function() {
  $(this).toggleClass('active');
});

$('.clear-button').on('click', function(){
	$('.bingo-card__item').removeClass('active');
});
!
999px

Console