To play 4 color card game on a desktop, use your mouse to interact with the cards. Your hand appears at the bottom of the screen. To play a card, move your cursor over a matching card and left-click it to place it on the discard pile. If no cards match, click the draw pile to get a new card. For Wild cards, click to play, then select a color by clicking the desired color option. When you have one card left, click the “TAP” button to avoid penalties. The game automatically ends your turn after each action.