I started the game a second time with fullscreen selected, but now it seems to work... :)
tiny bug in the startwindow, if you move the mouse cursor over the window titlebar there is some sound glitching, maybe the confirmation sound is started and ended short time.
But for the game: I have to give this a try, to learn how the fight sytem works. I killed the rat, wipped myself (yes my sins...) :), but the monk killed me (I wiped myself, so all my sins must be gone :)))) the monk does not have to kill me :)))