text: game.start = function () {
    function whenGameover() {
      const board = $('#board');
      board.style.display = 'block';
      board.innerHTML = '<p id="game-over"><br><b>GAME<br>OVER</b><br>Click here to restart!</p>';
      $('#game-over').addEventListener('click',
      function onclick() {
        game.reset();
        this.removeEventListener('click', onclick);
      });
    }
  
    function processStage(n) {
      game.stage.start(n, () => {
        game.score += n * 100;
        setTimeout(() => {
          processStage(n + 1);
        }, 500);
      }, whenGameover);
    }
  
    setTimeout(() => {
      processStage(3);
    }, 1500);
  }
  
  game.reset = function () {
    game.lifePoint = GAME_INIT_LIFE_POINT;
    game.score = GAME_INIT_SCORE;
  
    $('#life').innerHTML = game.lifePoint;
    $('#score').innerHTML = game.score;
    $('#board').innerHTML = '';
    $('#board').style.display = 'grid';
  
    game.start();
  }
  
  window.addEventListener('DOMContentLoaded', () => {
    $('#version').innerHTML = game.version;
    game.reset();
  });
  