I panic because I nervous by my nature ((
Thanks for good words ! And about dropbox - I don't think this is right decision. DropBox, GoogleDrive, Kongregate, NewGrounds... its just "hostings". I think game not depends on hosting.
In any case: I remake smth and it's looks like game became to work fine!
It was my error: I compared lines before they are created. I'm surprised how it works?! But if the error (black screen) appears again, I do not know what else to do