Sliders are very fun to mash around and deal with and see what happens. Something something monkey brain neuron activation.
You have a piano roll motif for how the attacks happen, which is real clever and I like, but could you integrate that with the music somehow? So the music plays and switches tracks as the bullet patterns change?
Also, a minor UX thing that may be good to have, different patterns having different bullet colours - it would make my actions in the sliders feel a bit more impactful if I could easily pinpoint them!
Awesome work!!