@spacejanitor
You can use Ctrl (Strg?) and Space keys instead of Z and X. I'll update the instructions. In our next game we will probably use X and C instead, which seem to be next to each other even on exotic keyboard layouts. Except on Dvorak, of course...
@spacejanitor: Very good point! I actually wasn't aware of the qwertz layout. The Azerty layout (which I think is kind of common) is playable with the current keys, but I can understand qwertz is problematic. What would you say is the best approach; having a well designed layout that tries to work for "all" layouts, or having configurable keys?
 "B.A.L.L.Z"){kind=icon}