It's a 2 player game. Lugia (the white one) goes first. The first player has to click an attack (on their side of the attack oval) then it's the next player's turn. Each of your attack has advantages and disadvantages. How much damage you do to the other player depends on how lucky you are.
It's super fun but takes some time to finish. If you want to play down to negative lives you can but if you don't want that you could say someone won when som