Solid foundation I really enjoyed how the gun felt. Wave 2 kept resetting to 45 Zombies until I had to quit out because I couldn't die either. Not sure if my health rolled over or something like that but the health bar kept getting bigger.
I noticed that too when I was playing, fixed it so you can die, and wave 2 just lasts long, I can make it shorter though
Fixed everything, you can try again and give feedback.
