Thanks for the kind words! Sorry about the issues with German keyboard layout-- since release, I've discovered a lot of interesting localization problems I'd never even considered before.
Unfortunately, I don't have a German keyboard, so it's difficult to debug. Can you help me out by sending me the number codes for each of the special keys? http://keycode.info/ You can post here or email them to chef@toomanychefs.party. Thanks a lot!
PS: As a temporary solution, you can try to press Shift+; for ":" and Shift+/ for "?" (these are the key combinations for a standard QWERTY keyboard).