Update 0.8.67

Polishing, balance, and optimization.
I hope I didn't break anything after these changes, the game is also built on a newer version of Unity.

• The basic and maximum duration of the dynamic shield, invisibility, and neurostimulator have been increased to make them more useful even at the lowest level.
  
• Additional optimization of new steps on snow, on some levels their presence had a bad effect on performance.
  
• Some fixes on the Elysium level to improve the experience.
  
• Fixed the behavior of the bonfire (on some surfaces the bonfire was jumping)
  
• Enemy weak spots are no longer immune to plasma or explosions, although they are resistant to this type of damage
  
• A capsule generator has been added to the Cathedral level near the puzzle.
  
• The Cathedral level now has additional loot at the beginning and end.
  
• Island: window frames are now a little thinner, should look nicer, and more delicate.
  
• Less background noise in the new headquarters.
  
• Castle level: some of the wooden bridges on the walls are no longer completely destroyed, should reduce the number of players falling off the wall.