Here's an idea how to make the bullets meander a bit before reaching their target.
Basically this gradually increases the turning force, and uses sin() to meander in a curvy way. All the numbers in event 4 can be tweaked to change the effect in various ways.
https://www.dropbox.com/s/ffnik6zpbie7vte/chaos_bullet3.capx?dl=1
cool, exactly the same as the video