Very fun game! I didn't really understand the "battle" mechanic, but that's in line for the game I think! I imagine the kids arguing about how how "My toad zaps your toad to death" "Nuh uh!"
Thanks for your comment, glad you enjoyed the game! For the Card Battle, the player can play a card if the opponent's card has equal or lower power, or if it's the same color. We didn’t have time to add a proper tutorial for this mini-game.