1 & 2: Those are your two available attacks so far (more will be available later). Each attack has gives properties to the cards they are assigned to.
3: Displays all available information about the selected card. When you have vocabulary, you will also have the word put into a sentence to give extra meaning to the word.
4: This is the card pool: all of the cards you have collected so far. You assign each one of those cards to your abilities, whether it's offence or defense. Keep in mind that each ability has a limited amount of card slots so you have to choose wisely when deciding which card you want to assign to which ability!
5: The available card slots and the cards equipped to each ability. You'll notice the Punch has 5 slots while the whip has 4. You don't have to use all slots but linking fewer cards means you won't have as many cards to guess in battle, which will make your attacks weaker. This allows player to focus on the amount of cards they want to learn. The more cards are linked, the greater the challenge but the greater the reward!
And now the graphics:
New Defense, the Nuclear Shield:
New interactive button:
New attack selection animation (the previous one was too subtle):
New game file icon:
Foe health bar (new):
Human Pan (before transformation):
There are also other minor things but there would be little point in sharing them.