What did this game do well? (Answer in a few sentences)

• 1) Very suitable to exercise memory 2) Because they choose poker as cards, whose discrimination is suitable.
• I think the concept is quite straight forward and easy to understand. 20 second is a good timing not (not so short and not too long)

What could be done better? (Answer in a few sentences)

• 1) The UI looks a little strange. Sometime when I click "confirm" button, the card behind will also be clicked. 2) It's too hard as you only have one chance. If you get one wrong, then you lose.
• the UI is a bit off which is almost unplayable for me.