On point 5 (the upper dice bar): aaaaah, I see some more now, thank you! Actually, I wasn’t even sure how the dice rolling resulted in which defence die; Yahtzee did not cross my mind, although I play the game on a daily basis. XD Silly me.
PROTIP: you are perfectly allowed to add explanations/instructions in the game page and in the comment section here; I would advise you to do so. :)