Click the green flag to start the game. Three purple buttons with 2P, 3P, and 4P on it will appear. For a two-player game, click the purple button with 2P on it. For a three-player game, click the purple button with 3P on it. For a four-player game, click the purple button with 4P on it. Then, the game will randomly decide the player to start the first round. On your turn, click the green Start button to see your cards. You can click on one of your cards to play it to the discard pile if it has the same color, number, or symbol as the top card of the discard pile. If you cannot play a card on your turn or if you choose not to, click the deck on the left of the discard pile to draw one card. You cannot play the drawn card immediately on that turn regardless of whether it is playable or not. After playing a card or drawing, the next player in the current order of play takes their turn. Pass the device to that player to let them take their turn. If you have no cards left in your hand, you win the round and you'll score points based on your opponents' cards.
In the first round, the starting player is decided randomly, but in the second round and onwards, the winner of the round right before it becomes the new starting player. If the top card flipped to start the round isn't a number card, the game will flip another card to the discard pile until a number card is flipped. When you play a card with a special symbol on it, one of the following actions will be triggered depending on what the symbol on that card is. Skip (a card with a circle with a diagonal line in it): The next player loses a turn and the player after them in the current turn order goes next. In a two-player game, the player who played this card takes another turn. Reverse (a card with a pair of arrows pointing in opposite directions): The turn order changes from clockwise to counterclockwise and vice versa. The arrow to the right of the discard pile will flip to indicate this. In a two-player game, it has the same effects of a Skip card, so the player who played this card takes another turn. Draw 2 (a card with "+2" written on the upper left and lower right corners with two colored cards on the center): The next player draws 2 cards and skips their turn unless they can play another Draw 2 card regardless of color. If they do, the player after them in the current turn order draws 4 cards unless they can play a third Draw 2 card which forces the player after them to draw 6 cards unless they can play a fourth Draw 2 card, and so on until the cards are finally drawn. Wild (a card with a rectangle showing all eight colors): This card can be played anytime on your turn unless the player before you discarded a Draw 2 card or a Wild Draw 4 card. When played, you can change the current color to any color of your choice. Click on one of the eight colored buttons that appear above the deck and the discard pile that corresponds to your choice to change the current color to that color. Wild Draw 4 (a card with "+4" written on the upper left and lower right corners with a rectangle showing all eight colors with four black cards on the center): This card can be played anytime on your turn unless the player before you discarded a Draw 2 card. When played, you can change the current color (see the explanation of the Wild card for how to change the current color) and the next player draws 4 cards unless they can play another Wild Draw 4 card. Like with Draw 2 cards, its effects can be stacked by multiple players in turn order. If you win the round, you'll score points for your opponents' cards as follows. Number cards (0 through 9): Face value (A number 4 card is worth 4 points, and so on.) Skip cards: 20 points each Reverse cards: 20 points each Draw 2 cards: 20 points each Wild cards: 50 points each Wild Draw 4 cards: 50 points each The deck includes 216 cards as follows. 19 Red cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Blue cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Yellow cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Green cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Orange cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Purple cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Pink cards (one card numbered 0 and two of each card numbered 1 through 9) 19 Sky cards (one card numbered 0 and two of each card numbered 1 through 9) 16 Skip cards (two in each color) 16 Reverse cards (two in each color) 16 Draw 2 cards (two in each color) 8 Wild cards 8 Wild Draw 4 cards
