Are these fixes into #195? Because yesterday I played #192 and had the same problems as Arakorn, but only during one of the two playthroughs I did, both on Tourist.
The first one went totally smooth (render scale 0.7x, AA 2x). The second instead, hours later, was all jittery no matter the graphics setup, even after starting a new level many times. Menu was always fine though! Pretty weird.
I'll update to #195 asap to check it out. By the way, have you considered a Discord server for the game?