A game of Concentration!
The goal is to race the clock to match as many pairs of cards as you can. The more cards you match, the higher your score, pretty simple.
As you unlock further levels, the number of cards increases, as does the number of different card faces.
You can also play the VS mode of the game which allows you to connect to a friend's paired Bluetooth device to play against them. Of course, they will need to have the game installed too. The VS games are not timed and are just based on scoring. To start a VS game you and your friend should both have the game running. Then you can click on the VS button and then click on the name of your friend's device. Your friend's device will prompt them with the invitation and if they accept the game will start automatically! It's actually quite fun.
The game comes with two pre-packaged themes, Wilderness Creatures and Crazy Colors. The themes can be used interchangeably by clicking on the theme change button on the bottom left of the main menu screen. New themes will be added to future releases, some for free and some will require an in-app purchase to unlock them.
Thanks and enjoy!