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HTML

              
                <div class="game-board">
  <div class="points"></div>
  <div class="coin"></div>
  <div class="player"></div>
</div>
<div class="arrow-keys-container">
  <div class="arrow-keys-instructions">Use arrow keys to move</div> 
  <img class="arrow-keys" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/126441/arrow-keys2.png">
</div>
              
            
!

CSS

              
                .game-board {
  position: relative;
  height: 300px;
  width: 300px;
  background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/126441/dirt.png");
}

.player {
  position: absolute;
  width: 30px;
  height: 30px;
  background-size: contain;
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/126441/little-alien.png");
  background-repeat: no-repeat;
  background-position: center center;
  transition: all .1s;
}

.coin {
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 30px;
  background-size: contain;
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/126441/coin.png");
  background-repeat: no-repeat;
  background-position: center center;
}

.points {
  position: absolute;
  right: -110px;
  top: 0;
  width: 100px;
  font-size: 18px;
}

.arrow-keys-container {
  width: 300px;
  margin-top: 8px;
  text-align: center;
}

.arrow-keys-instructions {
  display: inline;
}

.arrow-keys {
  position: relative;
  top: 5px;
  height: 30px;
}
              
            
!

JS

              
                // Setup

var player = document.querySelector(".player");
var playerTopPosition = 60;
var playerLeftPosition = 60;

var coin = document.querySelector(".coin");
var coinTopPosition = 180;
var coinLeftPosition = 180;

var points = document.querySelector(".points");
var pointsCount = 0;

// Actions and render

function actions () {
  player.style.top = playerTopPosition + "px";
  player.style.left = playerLeftPosition + "px";
  
  coin.style.top = coinTopPosition + "px";
  coin.style.left = coinLeftPosition + "px";
  
  if (playerLeftPosition === coinLeftPosition 
      && playerTopPosition === coinTopPosition) {
    pointsCount = pointsCount + 10;
    points.innerText = pointsCount;
    ion.sound.play("coin");
    randomizeCoinPosition();
  }
};

// Game loop

function gameLoop () {
  actions();
  requestAnimationFrame(gameLoop);
};

gameLoop();

// Moving

function move (x, y) {
  playerTopPosition = playerTopPosition + y;
  playerLeftPosition = playerLeftPosition + x;
};

var listener = new window.keypress.Listener();

listener.simple_combo("up", function() {
  move(0, -30);
});

listener.simple_combo("right", function() {
  move(30, 0);
});

listener.simple_combo("down", function() {
  move(0, 30);
});

listener.simple_combo("left", function() {
  move(-30, 0);
});

// Placing coins

function randomCoordinate () {
  var randomNumber = _.random(0,9);
  return randomNumber * 30;
}

function randomizeCoinPosition () {
  coinTopPosition = randomCoordinate();
  coinLeftPosition = randomCoordinate();
}

// Coin sound

ion.sound({
    sounds: [
        {name: "coin"}
    ],
    path: "https://s3-us-west-2.amazonaws.com/s.cdpn.io/126441/",
    preload: true,
    multiplay: true,
    volume: 1
});
              
            
!
999px

Console