html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: black;
  touch-action: none;
  overscroll-behavior: none;
}

#app {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}


canvas {
  display: block;
}