Hi! Thank you for the feedback and trying the game out.
The threads are somewhat random, they always start expanding towards the direction AWAY from the middle. It would have been way better to let them follow the direction of the player movement at first but I found that my algorithm for generating them got really alow that way. In the end I worked out my own hybrid between different spline math functions which could have solved thus but never had the time to implement it, would have made the game a lot more intuitive for sure!