Hmmm I will think on the hint system and figure out a good way of implementing it!
In regards to your other query, if you know the question then you are guaranteed to move forward a tile. Some of the questions will give you an opportunity to retry and some will not. WIth the ones that do, whether you move or not is usually based on how close you were to the original answer. That's why its a trivia game! :P
Thank you for the feedback.