Thanks for the feedback! I agree a hold to move feature would be nice, we talked about it briefly as a team but I never got to it. I also think it might be tough to strike a balance between moving quickly and preventing unwanted movement - something for me to think about for a QoL update maybe.
I'm curious why the movement is stuttery for you, does it feel like the framerate is low or maybe that there's input delay? It feels pretty smooth to me but one thing I have learned from this jam is that there are lots of different hardware configs people use for the web builds.