html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
}
#wrap {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
#game {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: #000;
}
#boot-msg {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #888;
  font: 14px monospace;
  letter-spacing: 2px;
  pointer-events: none;
}