Is there a way to rebind controls? I find x and c being the buttons to rotate awkward, ans Z and X would work better.
It's especially annoying on a QWERTZ keyboard... ;)
Fortunately, that means the game reads keyboard characters, not keyboard scan codes! As a temporary workaround you can just create a different keyboard layout!
Just google "Microsoft Keyboard Layout Creator (MSKLC)", which is an official free tool from Microsoft.