Windows OS? Cursor is invisible/locked? Maybe you set sensitivity to zero, or you modified Inputs? Open settings and press "Reset" in General and Controls tab.
well my mouse works an the menus and all, but when I start playing I can't look, I checked everything it's all okay and I still can't play
my sensitivity is normal : at 2,00
my look settings are :
_look up : mouse up
_ look down : mouse down
_turn left : mouse left
_turn right : mouse right
tolally normal :/
I even deleted the game and redownloaded it and nothing changed