At each level, its task is to pass.
At the first level, you have to destroy the castle by 50%.
On the second you need to score 1000 points.
In the third damage, destroy the castle by 40% over time.
...
For each miss, there are penalty points in the form of adding a stone and taking away life from the catapult.
Levels of difficulty are combined.
5 kinds of difficulty for passing the level:
1. Destroy the castle with a stone.
2. The destruction of the castle at the time.
3. Destroy the archers.
4. Destruction of walls by n%.
5. Set of glasses.