In 7776 you don't have to go down the mine to get some coal.
Just press wrong buttons and relax with a pint of high quality beer.
Play with your fellows today from 12-00 AM to 11-59 PM UTC.
Getting coal is must, because:
2 coals = Score x 2
3 coals = Score x 3
4 coals = Score x 4
and so on.
That's how big treasuries are made!