Guard the gate. Deflect every fireball back at the dragon, climb all 15 levels, and keep the kingdom standing.
Use your mouse, finger, or the arrow keys to slide your shield left and right along the gate.
Hit the fireball back toward the dragon. Where it strikes your shield changes the angle — aim for the corners.
Every 2 points advances you a level and speeds up the fireball. Reach level 15 to save the kingdom.