Where do I find the bonus items?

Please check in the installed directory, there's a directory called "Documents", where you find the design documents (as png s), the manual (as pdf) as well as the map (as pdf).

How can I config the game?

The game will be installed pre configured. If you want to change some of the settings, you find in the installed directory a programm called "Conf.exe". Run this if you want to change some of the standard settings.

SPOILER: In the hotel, I can't ask for room 12, because I can't type in numbers

SPOILER: In the hotel at the counter talk with the man "get room". Then answer "yes". When asked about the room number, answer with "twelve". That works!