1. Try using your mouse on different surfaces.2. Try changing the sensitivity via blockland options of the mouse.
Gah double post. Anyway, I tried my mouse on a different surface. Still no difference :\
This happens to me when I used a tablet to play Blockland. I think it has to do with the mouse not reverting to the middle of the screen making Blockland think that you are still looking around.
So, are you suggesting me to use a different mouse?
Do you have a tablet connected to your computer?Are you using a mousepad?
Well, if you have any free mouses (Like your mom's or something), So Borrow it and try out.