How do I get crystals?

You can complete the game easier and faster with crystals. Crystals can be used to buy energy and bombs, speed up production and purchase missing items. You can also get decor for the village in exchange for crystals.
You can get crystals in the following ways:
- For completing tasks in the village and on the story islands;
- For participating in events;
- For viewing ads;
- For completing daily tasks and Archaeologist's Quests on the islands.