Today, we added a Feat system. #feats are accessed in game and extend game play beyond 60, due to the EXP beyond 60 going into a pool to fill Bottles of Experience.
What is neat about this system is that you may help your friends with it due to the item requirements being trade able. (Yep, AA's reagents can be traded, including one representing the EXP).
They also have no level requirement. They're expensive, and a bit tedious, to keep you busy.
Since Rebuild is focused on making a more casual game, the more grindy friends can help out the more casual by helping them with the farms.