The game has many features that you can use, like Play, Swap and Pass. 

It is very easy to access these buttons and here's how:

1. Access one of your active games

2. At the bottom of your screen, you'll see the Play button.

3. Go to the lower left corner of the board then tap the hamburger menu.

The list of features will appear and this includes the Pass and Swap buttons.

Simply tap on the feature you would like to use.