Is this game playable with keyboard and a normal (ie not gaming) mouse? My brother's been trying to play it, but whenever he needs to use the mouse to "rotate camera" or to "aim turret" it doesn't work, so he's stuck and can't progress in the game now. Also, the white windows mouse pointer continually pops up around the screen ingame, which is distracting. I've googled the problem but found no solution so far. Apparently it's a console port game... Can we get it to work?