Most of the english on the page is pretty good. I can tell it was written by a non-native speaker, but I can still understand what you're saying, so it's not a problem.
Krai Mira has no predetermined storyline, and the player has a great number of the ways of development.
I would say, "...and the player can choose many paths of development," or even better, "...and characters may be developed in many different ways."
Options to play for bad character
This should probably be, "Options to play as a bad character."
Puncher is great. I've never seen that word used as a character class, but it works. Do not change it.
Monster’s behavior is described by artificial intelligence (AI).
This sentence is technically correct, but I'm not exactly sure what you're trying to say. I think what you mean is, "Monster behavior is controlled by artificial intelligence (AI)."
There are some minor errors in the rest of the text, but nothing that prevents me from understanding what you are trying to say.
Good luck with the game, it looks great so far!
