Here are the changes:
When testing a deck, for cards in hand:
- swipe right to play it to the battlefield
- swipe left to put it on top of your library
- swipe left with two fingers to put it on the bottom of your library
Also, swipe left on a card in the battlefield or graveyard to put it back into your hand.
We hope you can get the hang of it, and screenshots are included below. Enjoy!