In this game, you have to be fast and quickly count the number of cards in each level and then choose the right number (answer) from the available choices on the bottom of the screen. There is a time limit for each level and the game is over if you run out of time or you choose the wrong answer. The game has 3 difficulty levels in general and as you progress, the game will become harder and players will have less time to count the cards.
Touch on mobile device or mouse on PC.