Shooters shoot at the player within a certain range. Most shooters are magenta, but they can differ.
The most common shooters are magenta coloured, and have slow large purple bullets that each deal 5 damage. Its reload speed is fast but its view range is only 5 blocks.
Typical magenta shooters. The third is inactive.
Two red shooters. Notice the small yellow bullets.
Other shooters are differently coloured and have different reload rates, range, and damage.
Some big yellow shooters, in the third boss level. Notice the boss on the far right.