I just started and was able to get through the prologue into the first part where the character is controllable. However, bizarrely, the WASD keys don't work at all. In fact, none of my letter keys work! If I go to reassign keys, and for instance try to reassign WASD to other keys, letter keys and number keys don't work. The only things that work are control keys -- tab, space, the arrow keys, numlock, etc. I thought this might be a localization problem, because I was set to use another language by default for non-Unicode programs. So I reset everything to English (United States) in Windows. Unfortunately, that didn't fix the problem. Neither disabling Steam Overlay or changing screen modes. Any ideas?