needed in globals.js:
var g_kount=0;
and to make sure the panel disappears, you'll also need:
var g_rock=true;
and the following will replace your rock_clicked function in clicks.js:
function open_rock() {
  var rock=document.getElementById('rock');
  rock.classList.add('move');
  g_rock=false;
}
and you'll need this extra line in set_scene:
  if (n==5 && g_rock) Show_class('cell');

And that brings us to the end of this adventure.
I hope that you're inspired to create an adventure of your own.


Happy coding ... Peter