The questions used in the rules roundup game are generally shorter than the questions on the actual exam. So I don't think a timer will be of much use. I am thinking that it would be good to get immediate feedback after every question. Yes? No?
The cows give you a certain amount of immediate feedback already. I didn't mind waiting until the end for the rest, but there were times when I just took a guess, and got it right, that I would have liked to see a description of the question anyway. My 2 euros Eric B.