Maxing out Kuku Kube - http://106.186.25.143/kuku-kube/en-3/

kuku-kube.js

new MutationObserver(function() {
  var slotA = {
    count: 0,
    color: null,
    element: null
  };

  var slotB = {
    count: 0,
    color: null,
    element: null
  };

  var tiles = document.querySelectorAll('#box > span');

  for (var i = 0, len = tiles.length; i < len; i++) {
    var tile = tiles[i];
    var color = tile.style.backgroundColor;
    var targetSlot = (!slotA.color || slotA.color === color) ? slotA : slotB;

    targetSlot.count++;
    targetSlot.color = color;
    targetSlot.element = tile;

    if ((slotA.count > 1 && slotB.count === 1) || (slotA.count === 1 && slotB.count > 1)) {
      var result = (slotA.count > slotB.count) ? slotB : slotA;

      setTimeout(function() {
        result.element.click();
      }, 0);

      break;
    }
  }
}).observe(document.querySelector('#box'), {
  attributes: true
});