first of all, thnx for your feedback!
I am pretty sure it will help us improve our game if we will continue working on it😃
I think that the mouse sensitivity and the jump issues are just a glitch because in the same version they works well for me
Anyway we should add some settings including mouse sensitivity to avoid such issues
But the camera target is the same with weapon target, because we used ik animation to ensure that they hit the same point, maybe we will add some kind of muzzle flashes or even change it to physics based bullet and some other types of weapons(something like explosive weapons etc..)
We tried to fix the camera by adding a cinemachine collider to it in the end of the time but the gameplay became worse and there was no time left so we decided to remove it to leave controls as smooth as they are untill we decide to start working on it again!