Game description from the publisher:
Dragon Diego Dart and his friends have gathered for the annual competition of fireball throwing in front of the biggest volcano in the whole dragon valley. One by one, the dragons fire their balls and place their bets on who will hit the crater.
In Diego Drachenzahn: Vulkanwettkampf, multiple rounds are played. The player whose turn it is becomes the dragon player. At the beginning of the round, the dragon player secretly chooses one of the four fireballs. By tilting the box, he then tries to have the chosen fireball roll into the volcano while trying to ensure that none of the other three balls land there beforehand. As soon as a ball lands in the volcano, the other players guess which ball the dragon player had been trying to maneuver into the volcano. Whoever proves to have the most skill at aiming and making smart guesses will collect the most points and win!