add on to my last comment
more types - octopus shooter shoots in all eight directions
duo shooter - trio shooter - quad shooter
shooter in that amount of bullets at once
more bullet options yellow circle black circle glowing cannonball
you need more types
burn makes foes run faster but dose damage over time
poison does damage over time
splash damages the foes around the bullet
more bullet options
lightning
green circle
more upgrade levels
6
7
8
9
10
at final level of a tower its range goes rubish and its annoying becuase im trying to make a bash tower with 500 range at final level thanks to glitch i cant unless i use two of my upgrade towers