Corrected a few grammatical errors in the text, as well as added some new phrases and a little of their design

Also in my favorite scene was added a more adequate screamer, which I wanted to see originally, but unfortunately I didn`t know how to implement it. 

Thank you very much for your attention to the novella! In a day and a half the demo was downloaded already 40 times and 1 time appreciated, I'm very glad and grateful to everyone! ♡