for now if you dont know an item you can look at this. the items are
Purple gun: bazooka
low ammo, big bullets, big damage
Ak: ak
full auto, quick shooting, lots of ammo, low damage
starter gun: starter gun
you should know if you played the game
silver bullet:
extra damage
blue and red bullet: Zig zag bullet
extra damage, weird pattern when shot
bullet that is silver but half missing: fragment bullet
splits into 4 fragments on hit, low damage
ice block: slows enemies on hit
lightning strike: aftershock
spawns a yellow damaging lightning thing on hit
green scribbles: poison
poisons on hit
weird metal looking thing: nail
extra damage (was originally meant to be a wooden stake for undead enemies but then i made all the enemies robots)
weird red looking scribbles: crit chance and damage up
clock looking thing: stun enemies on hit
there might be more i dont remember