I do not know if it is necessary to write about such errors here.

But I started to have fps in the game after the 40th day. For some reason, fps began to fall in the main room and bedroom from the usual 40 to 11, or even 5 fps.

I thought it was due to rosital's visits to the endless hole, but no, after this event, FPS never returned to normal. I reduced the graphics in the settings, but it did not give any effect, I repeatedly re-entered the game, but it was useless.

I don't know what to do with it, the FPS drops in these two rooms, on the street in the basement and other parts of the map, the FPS is normal.

When im start the game, a window pops up like beware of such and such topics, after that a black screen and a crash

Not sure if this is a bug or not, but I troubleshooted the heck out of it and haven't figured it out. For some reason the game spikes my CPU temperature to a ridiculous degree. Other games barely going over 60c while VOTV hit's 90c and while spiking erratically from 60c and up. I have a thread that goes over all my attempts to resolve this. 

/t/4108139/black-screen-full-computer-crash#post-10990794

Только-что обнаружил в обучении. Если в состоянии рэгдолла, находясь в воде зажать пробел, то после выхода из состояния рэгдолла можно вылететь с большой скоростью
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Just discovered this in training. If you hold down the spacebar while in ragdoll while in the water, you can fly out at high speed after exiting the ragdoll state.
Русский/English (Google translator)

Боюсь вы об этом уже знаете, но я не нашёл такого-же обращения. Если в настройках угол обзора стоит выше 90°, то текстуры мира не стоят на поверхности. Надеюсь я понятно объясню. К примеру если положить предмет на землю с обычными настройками то можно будет увидеть предмет. А если угол обзора будет больше девяноста градусов то текстура земли станет выше предмета, и предмет нельзя будет увидеть.
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I'm afraid you already know about this, but I haven't found the same address. If the viewing angle in the settings is higher than 90°, then the textures of the world are not on the surface. I hope I can explain it clearly. For example, if you put an object on the ground with normal settings, you will be able to see the object. But if the viewing angle is more than ninety degrees, then the texture of the ground will be higher than the object, and the object will not be visible.
Русский/English (Google Translator)

После каждого запуска игры или выхода из режима обучения происходит "чистка": настройки возвращаются к стандартным и теряется достижение о прохождении обучения (поэтому нет возможности запустить режим истории)

After each start of the game or exiting the "tutorial", a “cleanup” occurs: the settings return to default and the achievement for completing the training is lost (therefore, it is not possible to start the story mode).

So I jumped off a small cliff and rag dolled when I hit the floor, as per usual, but when I was getting up, I clipped through the terrain and fell through the map. This has happened many times over when I updated my save. This wasn't a problem before 0.8.0e build.

Kerfur-O permanently stuck in flesh pit. Kerfur-O got taken in the flesh pit during "Do not open locker" event. I opened the locker to crash game, but now Kerfur-O stuck and has not teleported out (it's been 5 in-game days).

Omega Kerfur constantly gets stuck everywhere