I love the way you can shoot a hole in a zombie then shoot the zombie behind them, great game 5/5. Wish there was an arena mode and I personally found the spitfire and minigun to be unsatisfying and ineffective D: But other than those two things, you have created a brilliant game that is fun and easy to play.
Honestly a save function would ruin this game unless you deleted the save file after loading and only allowed one so that it is more like a "take a break" button but I haven't made it far enough to get bored, great game, been looking for something just like this for a long time, thanks for making it, 5/5, overuse of commas, FTW.
Epic game, 5/5 gun upgrades not being permanent is a good thing because if you had a heavy machine gun permanently the game would be too easy, and even still you can get ammo for your upgrades! So cope with the difficulty, it is on purpose.
I have noticed that there are ghost demons on the first level of lust, If this is an accident I just wanted to make you aware because the ghost demon does not show in the red circles in the level selector.