.info .date, .ss-social-button { display: none; }
 #item-58b995fc46c3c4543abf27ba .info .date {
   display: none; 
 }

You're sharing the game for others to enjoy. This is made much easier if you are always thinking about how you would explain this to your own colleagues to set up in their classes. Many find it helpful to see a list of clear set-up steps.

.info .date, .ss-social-button { display: none; }