Faster and "Cheaper" wall upgrades.
It would be cool to upgrade multiple walls at the same time. Maybe something like... Select Wall<Select Row<Upgrade Row...There can even be a discount for buying/upgrading in bulk, such as, save 10% gold when upgrading or buying 25 or more wall units at the same time.
theres some consideration needed
You have to takeinto consideration that level 8 and up walls get into the milions so this would eventally get use less if the wall upgrade is above 4 million 500 thousand