Thanks for stopping by! I think I definitely should have given the game to people to play test first (mouse-wise). I realised that the mouse sensitivity was likely going to be an issue. My mouse sensitivity is set quite low, so it's surprising to hear that the character turning is slow for you. Maybe you could turn up your mouse sensitivity a try again?
Good to know that the linux build works. (And that I should remove that folder, oops).
Edit: Adding a controls button and sensitivity slider is definitely on my list of things to do.
Thanks again!