A large number of fixes

[*]Monsters on the roof now walk, attack and can descend the stairs.
[*]Zombies in the dungeon now do not stand in one place, but wander and attack you.
[*]Monsters on the first and second floor will not get stuck (improvements are possible).
[*]The task of cleaning the roof became possible to perform.
[*]Significant improvements and corrections.



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