game.less

* { margin: 0; padding: 0; }
html, body, canvas, #game {
  width: 100%;
  height: 100%;
}
body {
  background-color: #000;
  font-family: arial, sans-serif;
}
canvas {
  position: absolute;
  left: 0;
  top: 0;
}
#ui {
  z-index: 1002;
  position: fixed;
  left: 20px;
  top: 20px;
  color: #fff;
  font-size: 14px;
  img {
    width: 32px;
    cursor: pointer;
  }
  p {
    display: block;
  }
}
.fadeOut {
  opacity: .2;
}
.fadeIn {
  opacity: 1;
}