After playing the game for 62 hours I did find 1 bug and 1 thing to make the game a little more user freindly.
-vampirism perk will now work with melee builds
-after wave 4 enemies will be slowed down so you can earn more upgrade points
-Rpg explosion animation will be added
Thats all that is planned for the time being. update should be out in a few days.
