Nice and easy to understand, as I'm sure most players are already familiar with the gameplay from matching card games.
I like how there's a leader board and you can choose a custom username and upload your score (I managed to get to the top of the leader board on my first attempt! 😎)
One thing I noticed is that the game runs very slow and uses a lot of processing power - around 90% of my CPU haha. 😆
Great job!