Yeah I tried to fix the bullets but couldn't identify the issue in time :(
Just for reference the effect you're most bothered by is lens distortion, not screen shake. I think it's mainly a matter of taste - I suppose the effect I'm envisioning is something more to do with reality warping, which I think it does suggest a rippled of that happening. Obviously could be refined, but in a vacuum a single shot vs a single enemy I think the effect is pretty close.
But I definitely messed up with it, when you're getting multiple crits and killing multiple enemies at once the nonstop intense jello jiggling is definitely not to my taste either. By the time I had actually realized it was a problem it was too late to fix it.
Still got lots to learn in terms of time management with jams. But I'm glad to hear you liked it in spite of the flaws :)