Umpire Survivors

This is a vampire survivors clone I learned how to make from the tutorial in the video link above with a few additions.  Totally for fun, not much playability after 40 seconds but whatever.

UPDATE:  Every 20 seconds you get a new gun, no limit.  Mobs doubled.  I still need them to progress too but that's for another day.

UPDATE: Timer added, Mobs HP/size randomized.  Balanced enough that the game should never allow standing still for more than a half second or so.