Base Defense is a single/cooperative modification based on horde-style and RPG systems. It's awesome, you should try it ;)
This little window should be there from the beginning, it's explaining what characteristics increases the ability you interested in.
GOT IT! :D
The most of information windows in bdef have this button :)
Looks nice, do you have a release date planed? or one you hope to make it by
Not yet, have a lot things planned, it's mostly balancing work and little features, which will turn the whole gameplay into new way.