I dont comment on stuff, but I follow the youtube video, i got it to work. I also write it in here. Download ex file manager. Install the game and make sure to open it so it can create a file. Next download StreamingAsset zip(right here in the game page). For me all I did was copy the zip, I didn't extract it at all. Once you copy the zip go to android >data > find lag game in it > click on file > then press paste. After that just leave it be and it will work