Hmm that's odd. Did you try increasing the sensitivity in the settings to make the controls more responsive? Or do you mean that the settings didn't change the sensitivity like they were supposed to because of a bug I missed (a very real possibility)?
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Sorry to hear that. Did you try using WASD/Arrow move mode?
I found that with mouse move mode, re-centering the mouse by picking it up and putting it back down would cause the star to bounce unpredictably. It helps if you only re-center your mouse on the obstacles' turn.
Also, I had a problem earlier with click move mode where the star jittered back and forth when I tried to move at very low speeds. I thought I patched it by changing the movement calculation, but it's entirely possible that I didn't.