Treasure hunts are events in which you roll the dice, and the Hatchling moves on the field depending on that number. As soon as the hatchling stops on the spot, the reward is collected and placed in a chest, from which it can be manually claimed.
When rewards from the chest are claimed, they are placed on cool down. The remaining time is visible on the chest; once the cool-down ends, you can claim the rewards again.
Win streak on higher levels will provide more dice to roll upon successful completion of a level. Note that optionally, a dice can also be acquired with gems.