Hotfix: Black Screen and Balancing

Hey, everyone! We have fixed the black screen issue that you mention in the feedback a lot these days.

- black screen & save files problem is solved
- we noticed that AI affected the difficulty of the game a little too much, and while we fixing it - the undead army got increased power to compensate for its "braindeadness"
- added a couple more minor fixes

We hope that the experience playing The Unliving will be much nicer now, and looking forward to your feedback!

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