I wish it were more consistent. Sometimes the green screen appears with this as well as the other games by WMS. After much fooling around with settings, deleting and reloading the games, and research, I found the solution to this problem is to play the game with the Airplane setting on. (I play this game on my iPad.) Fairly simple fix, especially after wasting more than an hour trying to find the solution. According to another post that I read, this is a problem with WMS. That being said, I still really enjoy all the WMS games, just wish I didnt have to keep adjusting settings to play.
Carymats about Kilauea - HD Slot Machine