Interesting ideas here. Building and switching weapons worked well. But would love to have those do things automagically? Would also love some visual feedback on hitting the zombies. Good job! Y'all made it!

Quite like the idea you've got going here! I do have some feedback:

 - The sprites all seem 'blurry'. Is this intentional? 

- The building is a little confusing. It took me a few rounds to figure out exactly how they work