I saw no problems with the orchestration or the mix, but if I might make a suggestion, you might want to work a bit with a dialect coach in English.
There's a very noticeable eastern European accent in your vocals which might sell nicely in western markets if that's what you're aiming for, but mainstream English vocals tend to be American sounding, even the Brits, who, except for punk rockers also sing with an American accent.
Anyway, that's my two cents but still a very haunting and lovely tune.
Gary