Normal style pretty much explains itself.
Vegas style changes the score to money, and removes the ability to cycle
repeatedly through the deck. Vegas style also adds the ability to
"deal" the cards instead of "new game". The difference is that "deal"
will not reset your score, it will decrement it by $52.
Draw Number : the number of cards to draw from the deck at once.
Change Cards, Change Outlines : changes the image of the card backs, and outlines respectively.
Change Background : changes the background image.