Uno Online offers a smooth and intuitive interface. Matching colors or numbers allows you to discard, while special cards add strategic depth. Play a Skip card to force the next player to miss their turn, a Reverse card to switch the playing direction, or a Draw Two card to make your opponent draw two cards and lose their turn. Wild cards let you change the current color in play, while Wild Draw Four cards not only change the color but also force the next player to draw four cards and forfeit their turn. Remember, the ultimate UNO power move is yelling "UNO" when you have only one card remaining!