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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML

            
              <div class="wrapper">
  <div class="timer">
       <span></span>    
  </div>
  <div class="gameover">GAME OVER</div>
  <h1>KILL THE BIRDS <span>(shoot the birds)</span></h1>
  <h2>PURE CSS GAME - NO JS!</h2>
  <input class="input-circle input-circle1" type="radio" id="circle1" >
 <input class="input-circle input-circle2" type="radio" id="circle2" >
 <input class="input-circle input-circle3" type="radio" id="circle3" >
 <input class="input-circle input-circle4" type="radio" id="circle4" >
 <input class="input-circle input-circle5" type="radio" id="circle5" >
 <input class="input-circle input-circle6" type="radio" id="circle6" >
  
  <label for="circle1" class="pajaro pajaro1"><span></span></label>
  <label for="circle2" class="pajaro pajaro2"><span></span></label>
  <label for="circle3" class="pajaro pajaro3"><span></span></label>
  <label for="circle4" class="pajaro pajaro4"><span></span></label>
  <label for="circle5" class="pajaro pajaro5"><span></span></label>
  <label for="circle6" class="pajaro pajaro6"><span></span></label>
  <div class="sum">SCORE:</div>
  <footer><a href="https://il.linkedin.com/in/eladshechter/">The Game Done By Elad Shechter</a></footer>
</div>
!

CSS

            
              body{
  counter-reset:birds;
  -webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
  overflow:hidden;
}
/*hide checkbox*/
input{position:fixed; left:-10px; top:-10px;}

h1{margin:0; text-align:center;}
h2{position:fixed; right:20px; bottom:0; font-size:18px; color:red;}

/*play area*/
.wrapper{  
  height:500px;
  background: -webkit-linear-gradient(top, hsla(210,70%,80%,1) 0%,hsla(210,50%,100%,1) 100%);
  position:relative;
  cursor:crosshair;
}
/*count dead birds*/
.input-circle:checked{
  counter-increment:birds;
}

.sum{position:fixed; left:45%; top:60px; font-size:24px; fonot-weight:bold;}

/*print to screen dead birds*/
.sum:after{
  content: counter(birds);
}

.input-circle ~ .pajaro{
  opacity:0;
  transition:0.3s  cubic-bezier(0,.43,1,0);
  animation: move 8s infinite alternate;
}
.input-circle1:not(:checked) ~ .pajaro1,
.input-circle2:not(:checked) ~ .pajaro2,
.input-circle3:not(:checked) ~ .pajaro3,
.input-circle4:not(:checked) ~ .pajaro4,
.input-circle5:not(:checked) ~ .pajaro5,
.input-circle6:not(:checked) ~ .pajaro6
{
  opacity:1; 
}


.input-circle1:checked ~ .pajaro1 span,
.input-circle2:checked ~ .pajaro2 span,
.input-circle3:checked ~ .pajaro3 span,
.input-circle4:checked ~ .pajaro4 span,
.input-circle5:checked ~ .pajaro5 span,
.input-circle6:checked ~ .pajaro6 span
{
  display:block;
  
}

.pajaro{   
  position:absolute;
  left:0;  
  cursor:crosshair;
}
.pajaro>span{
  display:none;position:absolute; z-index:2; left:-250%;bottom:-50%;  
  background-color:white; border:solid 2px #000; width:80px; height:30px; padding:10px; border-radius:50%;
}
.pajaro>span:before{
  content:"I'm Dead!"; color:red; font-weight:bold;
}

.pajaro1{top:50px;
  animation-delay: -2s!important;
  transform:scale(0.9);
}
.pajaro2{
  top:100px;
  animation-delay: -4s!important;
  transform:scale(0.5); 
}
.pajaro3{
  top:200px;
  animation-delay: -3s!important;
  transform:scale(1.4); 
}

.pajaro4{top:50px;
  animation-delay: -12s!important;
  transform:scale(0.9);
}
.pajaro5{
  top:100px;
  animation-delay: -16s!important;
  transform:scale(0.5); 
}
.pajaro6{
  top:200px;
  animation-delay: -20s!important;
  transform:scale(1.4); 
}

@keyframes move{
0%{left:0%;}
20%{left:20%;top:50%; }
40%{top:30%; left:60%;}
60%{top:80%;left:80%;}
80%{top:10%; left:20%:}
100%{top:30%; left:20%; }
}


.timer{
  background-color:#333; width:300px;height:50px;
  position:fixed;
}


.timer span{
  display:block;
  background:repeating-linear-gradient(-45deg, #000, rgba(0, 0, 0, 0) 25px, #FFF 25px, #FFF 50px);
  width:300px; height:50px;
  animation:timer 20s linear;
}

.timer span:before{  
  content:"TIME LEFT";
  display:block;
  position:absolute; z-index:3;
  left:0; 
  right:0;
  top:0;
  bottom:0;
  text-align:center;
  line-height:50px;
  font-size:25px;
  color:red;
}
@keyframes timer{
0%{width:10px;}
100%{width:300px; display:block;}
}


.gameover{
  position:fixed; z-index:100000; left:0; top:0; bottom:0; right:0; background-color:rgba(0,0,0,0.8);
  animation:gameover 20s linear forwards;
  font-size:80px; color:white; font-weight:bold; text-align:center; 
  text-indent:0;  
  line-height:500px;
}

@keyframes gameover{
0%{left:-5000px;bottom:100%;}
97%{left:-5000px;bottom:100%;}
100%{ left:0px;}
}

footer{position:fixed; left:0; bottom:0;}




/*------------------------------------------------------ body of the bird
*/

.pajaro{
  background:black;
  border-radius: 50% 50% 20% 20%;
  color:white;
  line-height:20px;
  letter-spacing: 2px;
  font-size:0.8em;
  text-align:center;
  position:absolute;
 
  margin-top:-20px; margin-left:-10px;
  width:15px; height:15px;
  animation:planeo 0.8s linear infinite;
  z-index:999;
}

.pajaro:after,
.pajaro:before{
  content:"";
  position:absolute;
  top:50%; left:50%;
}

/*------------------------------------------------------ bird wings
*/

.pajaro:after{
  border-radius: 100% 100% 0 0;
  box-shadow: inset 0px 5px 0 black;
  width:100px; height:100px;
  margin-top:-7px; margin-left:-50px;
  transform-origin: 100% 0%;
  animation:alas 3s linear infinite;
}

/*------------------------------------------------------ bird beak
*/

.pajaro:before{
  background:#FFC37F;
  border-radius: 100% 0% 20% 0%;
  margin-top:3px; margin-left:-4px;
  width:6px; height:6px;
  transform:rotateZ(45deg);
}

/*------------------------------------------------------ wings animation
*/

@keyframes alas {
  50%{
    transform:rotateX(-1440deg);
  }
}

/*------------------------------------------------------ bird animation
*/

@keyframes planeo {
  40%{
    transform:rotateZ(2deg) translateX(2px) translateY(10px) translateZ(0);
    line-height:16px;
    font-size:0.6em;
  }
  80%{
    transform:rotateZ(-2deg) translateX(5px) translateY(8px) translateZ(0);
  }
}
!

JS

            
              /**Second Version***
KILL THE BIRDS PURE CSS GAME - NO JS
------------------------------
Author: Elad Shechter
https://il.linkedin.com/in/eladshechter/
https://medium.com/@elad
https://coderwall.com/p/u/elad2412

MY FACEBOOK GROUP
https://www.facebook.com/groups/css.master/


The Bird taken from:
-------------------------------
https://codepen.io/fixcl/pen/KhAqa

Author: Marco Barría 
https://twitter.com/marco_bf

******/
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