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HTML 

              
                <link href='https://fonts.googleapis.com/css?family=BenchNine:300,400,700' rel='stylesheet' type='text/css'>
<title>HACKSYS the hacking game</title>

<audio autoplay loop>
  <source src="https://dl-web.dropbox.com/get/Public/Call%20of%20Duty%20Black%20Ops%202%20-%20Express%20Theme.mp3?_subject_uid=13406744&duc_id=dropbox_duc_id&w=AACds9Gc67jRLs0SWsEy6ero1eVj40ZwmTxutqNoOR0PDw" type="audio/mpeg">
</audio>

<div id="welcome-login">
  <h1>Welcome to HACKSYS the hacking game!</h1>
  <input id="login-input" type="text" placeholder="Hacker nickname">
</div>
  
<div id="terminal">
    <div>Loading...<span id="blinking">_</span></div>
</div>

<div id="root">></div>
<input id="input" type="text" placeholder="Enter your command here..." autofocus>

<div id="time">Trace time: 0:00</div>

<ol id="objectives">
  Welcome to HACKSYS the hacking game.<br><br>
  <div id="won">Congratulations! You are going to receive all the important conversations from this phone relay.</div>
  <div id="lost">You got tracked down. You better run while you can... Computer autodistruction process will clean up the rest...</div><br>
  Objectives:
  <li id="help">Type 'help' in the console, at the bottom of the screen.</li>
  <li id="list">Check the list of the currently available applications.</li>
  <li id="connect">Connect to the nearest phone relay (connect nearest.phone.relay).</li>
  <li id="trojan">Send a trojan to the phone relay you just connected to (send trojan).</li>
  <li id="disconnect">Disconnect from the phone relay before you are traced down.</li>
</ol>

<footer>
  &copy; Copyright 2014-2018 by bulanmaster. All rights reserved.
</footer>
!

CSS 

              
                * {
  color: green;
  cursor: default;
  font: 700 1em 'BenchNine', sans-serif;
}

html,
body {
  background-color: black;
  color: green;
  margin: 0;
}

#welcome-login {
  border: solid 1px;
  border-radius: 1em;
  margin: 0 5%;
  opacity: 0;
  position: fixed;
  text-align: center;
  width: 90%;
  z-index: 99;
}

h1 {
  font-size: 5em;
  margin: 0;
}

#login-input {
  background: black;
  border: solid 1px;
  border-radius: 1em;
  cursor: text;
  margin-bottom: 1em;
  opacity: 0;
	outline: none;
  text-align: center;
  width: 10em;
}

#terminal {
  border: none;
  height: calc(100% - 3em);
  opacity: 0;
  overflow-y: auto;
  position: fixed;
  width: 100%;
}

#root {
  bottom: 0;
  height: 2.6em;
  opacity: 0;
  position: fixed;
  text-align: center;
  width: 1em;
}

#input {
  background: black;
  border: none;
  bottom: 1em;
  cursor: text;
  display: none;
  height: 1.9em;
  margin: 0;
	outline: none;
  opacity: 0;
  position: fixed;
  right: 0;
  width: calc(100% - 1em);
}

#blinking {
  -webkit-animation: blink 1s linear 0s infinite;
  -moz-animation: blink 1s linear 0s infinite;
  -ms-animation: blink 1s linear 0s infinite;
  -o-animation: blink 1s linear 0s infinite;
  animation: blink 1s linear 0s infinite;
}

@-webkit-keyframes blink {
  from {
    color: #000;
  }

  to {
    color: #fff;
  }
}

@-moz-keyframes blink {
  from {
    color: #000;
  }

  to {
    color: #fff;
  }
}

@-ms-keyframes blink {
  from {
    color: #000;
  }

  to {
    color: #fff;
  }
}

@-o-keyframes blink {
  from {
    color: #000;
  }

  to {
    color: #fff;
  }
}

@keyframes blink {
  from {
    color: #000;
  }

  to {
    color: #fff;
  }
}

#time {
  opacity: 0;
  position: fixed;
  right: 1em;
  top: .5em;
}

#objectives {
  opacity: 0;
  position: fixed;
  right: .5em;
  top: 1em;
  width: 25%;
}

#won,
#lost {
  display: none;
  opacity: 0;
}

#objectives li {
  opacity: 0;
}

::-webkit-scrollbar {
    width: .5em;
}

::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0em 0em .5em rgba(0, 255, 0, .25);
}

::-webkit-scrollbar-thumb {
    -webkit-box-shadow: inset 0em 0em .25em rgba(0, 255, 0, .5);
}

footer {
  bottom: 0;
  font-size: .8em;
  position: fixed;
  text-align: center;
  width: 100%;
}
!

JS 

              
                $(document).ready(function() {
  var divx = document.getElementById('terminal');
  /* Welcome screen */
  $('#welcome-login').animate({'opacity': '1', 'top': $(window).height()/2 - $('#welcome-login').height()/2 }, 3000);

  setTimeout(function() {
      $('#login-input').animate({'opacity': '1'}, 3000);
  }, 4000);

  /* player login */
  var player_name = "Anonymous";
  var logged = 0;

  $('#login-input').keypress(function(e) {
    if(e.which === 13 && $(this).val() != '') {
      player_name = $(this).val();
      logged = 1;
      $('#welcome-login').animate({'opacity': '0'}, 1000);
      /* objectives */
      var help = 0;
      var list = 0;
      var connect = 0;
      var trojan = 0;
      var disconnect = 0;

      var won = 0;
      var able = 0;

      window.setInterval(function() {
        if (won === 0) {
          if (help === 1) {
            $('#objectives #help').css({'color': 'red'});
            $('#objectives #list').animate({'opacity': '1'}, 1000);
            if (list === 1) {
              $('#objectives #list').css({'color': 'red'});
              $('#objectives #connect').animate({'opacity': '1'}, 1000);
              if (connect === 1) {
                $('#objectives #connect').css({'color': 'red'});
                $('#objectives #trojan').animate({'opacity': '1'}, 1000);
                if (trojan === 1) {
                  $('#objectives #trojan').css({'color': 'red'});
                  $('#objectives #disconnect').animate({'opacity': '1'}, 1000);
                }
              }
            }
          }
        }

        if (disconnect === 1) {
          $('#objectives #disconnect').css({'color': 'red'});
        }

        if (minutes <= 1 && help === 1 && list === 1 && connect === 0 && trojan === 1 && disconnect === 1) {
          won++;
        }

        if (won === 1) {
          $('#objectives li').animate({'opacity': '0'}, 3000);
          $('#objectives #won').show(3000).animate({'opacity': '1'}, 3000);
        } else if (won > 1) {
          won = 2;
        }
      }, 1000);

      /* timer */
      var seconds = 0;
      var minutes = 0;
      var danger = 0;
      var lost = 0;

      window.setInterval(function() {
        if (connect === 1) {
          if (seconds < 10) {
            $('#time').text('Being traced: ' + minutes + ':0' +seconds);
          } else {
            $('#time').text('Being traced: ' + minutes + ':' +seconds);
          }
          if (seconds < 59) {
            seconds++;
          } else {
            seconds = 0;
            minutes++;
          }
          if (minutes >= 0 && seconds > 45) {
            $('#time').css({'color': 'red'});
            danger++;
          }
          if (danger === 1) {
            $('span').remove();
            $('#terminal').append('<div>You have only 15 seconds left...<span id="blinking">_</span></div><br>');
            divx.scrollTop = divx.scrollHeight;
          } else if (danger > 1) {
            danger = 2;
          }
          if (minutes >= 1 && seconds > 0) {
            $('#time').text('You\'ve been traced down!');
            lost++;
            able = 0;
          }
          if (lost === 1) {
            $('span').remove();
            $('#terminal').append('<div>You\'ve been traced down!<br>Formatting HDD...<br>Goodbye...<span id="blinking">_</span></div><br>');
            $('#objectives li').animate({'opacity': '0'}, 3000);
            $('#objectives #lost').show(3000).animate({'opacity': '1'}, 3000);
            divx.scrollTop = divx.scrollHeight;
            $('#objectives li').css({'color': 'green'}).animate({'opacity': '1'}, 3000);
            setTimeout(function() {
              $('#terminal').animate({'opacity': '0'}, 1000);
              $('#root').animate({'opacity': '0'}, 1000);
              $('input').animate({'opacity': '0'}, 1000).hide(3000);
              $('#objectives').animate({'opacity': '0'}, 1000);
              $('#time').animate({'opacity': '0'}, 1000);
              help = 0;
              list = 0;
              connect = 0;
              trojan = 0;
              disconnect = 0;
              won = 0;
              $('#objectives li').css({'color': 'green'});
            }, 20000);
          } else if (lost > 1) {
            lost = 2;
          }
        }
      }, 1000);

      setTimeout(function(){
        $('#terminal').animate({'opacity': '1'}, 1000);
      }, 1000);

      setTimeout(function(){
        $('#root').animate({'opacity': '1'}, 1000);
        $('input').animate({'opacity': '1'}, 1000).show();
      }, 5000);

      setTimeout(function(){
        $('span').remove();
        $('#terminal').append('<br><div>Welcome to HACKSYS [version 1.0.0].<br>(c) Copyright 2014 HACorp Corporation. All rights reserved.<br><br>' + player_name + ' authenticated.<br>HACKSYS ready for use.<br>Use the help command for a list of commands.<br><br><span id="initial-root">$</span>&nbsp;&nbsp;&nbsp;<span id="blinking">_</span></div>');
      }, 6500);

      setTimeout(function() {
        $('#time').animate({'opacity': '1'}, 3000);
        $('#objectives').animate({'opacity': '1'}, 3000);
      }, 7000);

      setTimeout(function() {
        $('#objectives #help').animate({'opacity': '1'}, 500);
        able = 1;
      }, 10000);

      $('#input').keypress(function(e) {
          if(e.which === 13 && $(this).val() != '' && able === 1) {
            $('div span').remove();
            $('initial-root').remove();

            /* 
             * List of commands available in the game:
             * 
             * help
             * list
             * connect nearest-phone-relay
             * send trojan
             * send adware
             * disconnect
             * exit
             * 
             */

            switch( $(this).val() ) {
              case 'help':
                $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>List of commands:<br>help - Show this message (command list)<br>connect [DNS name] - Connects host computer with the targeted DNS name<br>disconnect - Disconnects host computer from the connected DNS name<br>exit - Shuts down host computer<br>list - Shows the list of the currently available applications<br>send [application type] - Sends given application name to the connected DNS name<span id="blinking">_</span></div>');
                help = 1;
                break;
              case 'connect nearest.phone.relay':
                if (connect === 0) {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>Connecting...<br>Connected.<br>You have 1 minute before you get traced down.<span id="blinking">_</span></div>');
                  connect = 1;
                } else {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>You are already connected to nearest.phone.relay.<span id="blinking">_</span></div>');
                }
                break;
              case 'list':
                $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>List of currently available applications:<br>AdBreak - bombard targeted computer with advertisement pop-ups (type: adware)<br>Trojan.Vaklik.BBB - steals vital information from the targeted computer (type: trojan)<span id="blinking">_</span>');
                list = 1;
                break;
              case 'send trojan':
                if (connect === 1) {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>Sending Trojan.Vaklik.BBB...<br>Trojan.Vaklik.BBB sent.<span id="blinking">_</span></div>');
                  trojan = 1;
                } else {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>You are not connected to any DNS name.<span id="blinking">_</span></div>');
                }
                break;
              case 'send adware':
                if (connect === 1) {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>Sending AdBreak...<br>Unable to send AdBreak.<span id="blinking">_</span></div>');
                } else {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>You are not connected to any DNS name.<span id="blinking">_</span></div>');
                }
                break;
              case 'disconnect':
                if (connect === 1) {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>Disconnecting...<br>Disconnected<span id="blinking">_</span></div>');
                  disconnect = 1;
                  connect = 0;
                  minutes = 0;
                  seconds = 0;
                } else {
                  $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>You are not connected to any DNS name.<span id="blinking">_</span></div>');
                }
                break;
              case 'exit':
                $('#terminal').animate({'opacity': '0'}, 1000);
                $('#root').animate({'opacity': '0'}, 1000);
                $('input').animate({'opacity': '0'}, 1000).hide(3000);
                $('#objectives').animate({'opacity': '0'}, 1000);
                $('#time').animate({'opacity': '0'}, 1000);
                help = 0;
                list = 0;
                connect = 0;
                trojan = 0;
                disconnect = 0;
                won = 0;
                $('#objectives li').css({'color': 'green'});
                break;
              default:
                $('#terminal').append('<div>$&nbsp;&nbsp;&nbsp;' + $(this).val() + '<br>Command not recognized. Type in help for a list of commands.<span id="blinking">_</span></div>');
            }
            $('#terminal').append('<br>');

            divx.scrollTop = divx.scrollHeight;
            $(this).val('');
          }
      });
    }
  });
});
!
999px

Console