This game is not optimized a lot, so meanwhile you are playing you found some bugs and the annoying bug of the mouse won't let you play as you want.

Well, i've found many solutions for this problem.


1.- Simply press U, this solution usually works the 99.9% of times.


2.- Go to mouse setup and be sure that the vertical aim is enabled.


3.- Doesn't work both solutions, Ok, try to disconnect / connect your mouse again.

4.- Also if the steps 1, 2 and 3 doesn't works, try to restart the game. It works sometimes (0.1% of times ... Works for me).

Hail to the king baby !
　
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