.APK file does not contain all necessary files and files I was looking for were stored here:
/data/data/<game packageid>/files/<version of app>

But that time I didn’t know that and as result I came to conclusion that this thing is done from code. And I decided to decompile game logic. This particular game uses LUA language for most things. This is quite simple language, but it is compiled to byte code and needs to be decompiled back to source code. I immediately found this https://github.com/viruscamp/luadec and I did attempt to decompile simple file but it instantly failed. After some research and looking at simplest file I found that it has only one instruction: Return and it