From a collection of downward facing cards, flip up 2 cards to find a match. If the 2 cards you just flipped do not match then both cards are flipped face down again. If the 2 cards you just flipped are a match, they remain flipped and are not used again. The game ends when all cards have been matched!
There is a free mode where you can select bronze, silver, or gold difficulties. There is also a time trial mode where you can play starter, bronze, silver, and gold difficulties all after each other, against a 10 minute time limit.
Each mode is able to select different card types from fruits, flags, or letters. Time trial mode scores are recorded, and used to award medals. There are also some basic graphic quality and sound options available to tweak the experience on each of your devices.
The only difference between free and paid versions is adverts above the game screen. All game features are available to free and paid versions.
Times, scores, and medals acquired in the free version are not carried over to the paid version. If you're noticing considerable lag while playing then try lowering graphic quality in the options.