Id player and ....

The possibility would be nice to find players through their Id.
It would be helpful to find friends and former classmates of game.
Besides I would propose the lowering of the cost to improve the wall.
New addition of flying forces that dot on the side so compensating the ability of the hot-air balloons.

I agree finding old players would be sweet. The only downside is someone could find people they hate just to troll them. Maybe if there was a new section next to bookmarks called "Friends List" where both people add each other, then you can always find people