Sad to say, but it seems that I must suspend project now.
The reason is buggy Game Maker. When quantity of sprites in my game exceeds some number game starts to glitch, freeze etc. I checked all my code, and it seems to be GM issue. The same game without some sprites run perfectly, add them and it ruines. It seems its somehow collide with FMOD wrapper also.
Maybe with some GM update problem will disappear, but until then it seems that tens of new sprites, over a hundred rooms, dialogs and monsters, new music and sound effects was a complete waste of my time.