.ball-pit-overlay {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  min-height: 400px;
}
.ball-pit-overlay canvas {
  min-height: 400px;
  position: absolute;
}
.ball-pit-overlay canvas:first-child {
  opacity: 0;
  background: transparent;
}