So where do we learn how to make the turrets that fire?
I never made a course about building the turrets and enemies, but I built them using the same process that Kent used here: https://cgcookie.com/course/modeling-modular-game-assets
If you run into any issues or want feedback, post what you've got over in the Community forum, @ mention me (jlampel) in a comment, and I'll be happy to help.