The keyboard commands mentioned in the manual and the game are wrong! For example: Space doesn`t block but bring up a menu, I found out that I have to press shift instead to block. Also the other keyboard commands seem to be wrong and there is no way to change the keybindings.

Sorry for doublepost, but I forgot to mark the first thread as question.

Are you sure you can't change the keybindings? Did you look inside the game directory (possibly at C:/games/Sudeki)? There must be some sort of configuration program in there with tabs for the graphics & the controls. Also maybe through the launcher.

edit: you can change the options in "..%APPDATA%\Sudeki\PlayerOptions.xml".

edit 2: according to PCgamingWiki, you can remap the controls via the launcher.
http://pcgamingwiki.com/wiki/Sudeki

I found the launcher now. Strange: The launcher is in German although I installed the english version. Also weird, the options say that blocking is Leertaste (space in english) but if I hit space in the game it doesn`t block but bring up the menu. A PlayerOptions.xml doesn`t exist.
Seems like the program itself has some weird kind of keybindings that can`t be changed by its own configuration tool.
Extremely annoying!!!

You'll find the "PlayerOptions.xml" in "C:\Users\*********\AppData\Local\Sudeki\PlayerOptions.xml" or in "C:\Users\*********\AppData\Roaming\Sudeki\PlayerOptions.xml". More information here.

In place of the ***********'s, is your Username. The AppData folder is hidden.

Take a look into that .xml in case it has the key bindings stored somewhere. Hope that helps a little!

In your game folder there is the SudekiLauncher.exe, use that to start the game.

Just starting Sudeki.exe after I configured everything brought up the same problems, it also did not start with my graphical settings but in 640x480.

Using the Launcher and starting the game with it fixed that.