On the upper left corner, you will find your information, username and the points you've earned during the game.
By tapping on your picture, you will access your profile, where you can find your information: username, country, friends and statistics (Records and Games).
On the other hand, on the upper right corner, you will find your opponent's information, their username and points earned in the game. If you select this, you can also access their information and game statistics. Also, if you tap on the three-dots icon on the right, new options will be unfolded: 'Resign', 'Chat' and 'Poke'.
In a blue bar, on the game's grid, you will see the different PowerUps you can use, with their corresponding icons and the number you have of each of them.