Castle upgrades by level
Google is the answer here. The Simpsons tapped out wikias are also very good and very fast at post this info. *removed external links*
Forum Discussion
op, there is a walkthrough here:
http://forum.ea.com/eaforum/posts/list/10148909.page
There is also an FAQ stickied at the top of this forum.
http://forum.ea.com/eaforum/posts/list/10148909.page
There is also an FAQ stickied at the top of this forum.
