So i have noticed that the maximum number of exhibits on the NDS version of Zoo tycoon is 20. Is there any way to increase that? Like a setting or some code? Cause i covered only half of the large maps by building 20 exhibits and the rest is just awkwardly empty. When i try to build another fence in addition to the existing 20, i get a message saying "You cannot place more of this object". Can anyone tell me if there's something i can do regarding this?