Select a challenger to duel. Use the ARROW Keys to counter the spell and inflict damage on your opponent. Double spells require two key presses to counter. Press the SPACE BAR to fire at and inflict damage to your challenger. Counter a spell while it is white to double the points and damage inflicted on the challenger. When a spell changes to red it is close to hitting you. A red spell is only worth half the points and inflicts half the damage to the challenger. To cast a spell, counter a spell with a star attached. If a spell hits you, your life will be decreased.