It seems that 'Class Technique' key binding doesn't work at all (ie you can set it with any wished key, but the games ignore it).
It is fixed to 'Z' key even if it isn't reported from the settings screen.
I also wonder how can this game be played by Gamepad, when the seems to use a hundred of different keys on Mouse + Keyboard?
Is the Gamepad mode something like a version for children of the game?
Or Mouse+keyboard settings might be a bit aggregated?