CSS specific for the game

game.css

.game-container {
  position: relative;
  margin-top: 4rem;
  /* Subtract half of the board width*/
  left: calc(50% - 260px);
}

.game-container .block {
  display: block;
  position: absolute;
}

.game-container .block.wall,
.game-container .block.floor {
  background: #717d7e;
}

.game-container .block.brick {
  border-style: solid;
  border-color: gray;
  border-width: 1px;
}