We really appreciate the in depth feedback! The marbles definitely weren't explained as best as possible, but essentially the turrets will always focus on the most recent sound emitted within their radius, so when a marble makes a sound, that's when they lock in on it. Usually marbles will make a sound whenever they collide with anything else like a wall, but I think I might have made their audio source range too small since if you throw them far enough you might not be able to hear them