capped auction
moved dna to a higher tier in super balanced pack
fixed ball bullets scaling way too high with homing balls
fixed merchant and stop sign crash
clarified beach ball artifact
fixed metropolis typo in description


null cannon
lvl 1: 4 -> 8 mult
lvl 2: 6 -> 16 mult
lvl 3: 9 -> 24 mult
lvl 4: 13 -> 30 mult

purifier
lvl 1: 1.3 -> 8 damage
lvl 2: 1.6 -> 16 damage
lvl 3: 2 -> 32 damage
lvl 4: 3 -> 50 damage

sanitiser
lvl 1: 2 -> 6 damage
lvl 2: 4 -> 12 damage
lvl 3: 6 -> 18 damage
lvl 4: 9 -> 28 damage