The cards on the board are called the tableau. In the settings, you can turn autoplay on and off, turn sound on and off, view your game statistics, and view the instructions of the game (just in case the following explanation isn’t enough). There are buttons to start a new game, access settings, and undo the last move. In the bottom left, there’s a timer, and your best time is on the bottom right.
Once you hit play, the action begins! The game will automatically arrange your beginning setup.