I wasn't referring to the bullet speed. But before they start flying, they linger on the walls for the few seconds, allowing you to position yourself. That works just fine the first time you go through a certain pattern, however if you already know where to go, you end up spending few seconds just waiting for them to fire. And then you have to wait again on the next pattern. And if you get hit you have to once again wait on every single one of them.

I have nothing against resetting the entire room, my problem was that most of the time, instead of avoiding bullets, I was just sitting there, waiting. And that's just not fun.

It's too easy, literally every level is a bunch of bullets that appears faster each level.