html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #0a1220;
}

body {
  display: grid;
  place-items: center;
}

#game {
  width: 100vw;
  height: 100vh;
}

canvas {
  display: block;
  image-rendering: pixelated;
}