I've got 3 better ammo systems in the new version ,I'm choosing one to put into the game ,yet I would like to know which one you prefer ?
System 2 is best among the options because it is faster, the player should not struggle that much for ammo when there is endless enemies, i hope you rethink this, good luck.
You should combine 2 and 3 so you can shoot a lot and refill often.
