Zombie Survival (concept)

This was my first stand alone game idea after several tutorials and tests. Its not much, more the concept of an idea that was WAY to big. Since why not make the number one mistake when making my first game... It all kind of works, but is far from perfect but im still happy with it as a basic concept. About the game. .... Controls: • P = Freeze the camera (or unfreeze) • R = rotate buildings or objects when building them • Z = removes a piece of ground, but DONT USE IT, just didnt the get it out,...