This is a solo version of the classic card game Uno.
Players take turns matching cards in their hand that match either the color or the number of the card on top of a discard pile. A game typically consists of two players, although it can also be played with a computer opponent.
The objective of the game is to be the first player to get rid of all their cards by matching numbers or colors. The game can run in the browser without any need for a download or registration. The player with the last card in their hand loses the game.