body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #70c5ce;
}

.game-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.wrapper {
  display: flex;
}

.box {
  position: relative;
  padding: 0.5em;
  border: 2px solid #333;
  border-radius: 8px;
  margin: 20px;

  background-image: url("flappybirdbg.png");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

canvas {
  display: block;
  background: transparent;
}