WOW! Did you seriously ask that???
meenie D:\
I'm sorry... it just seems to be more of a common sense thing... to me, at least... plus, who's going to use 134227728 layers? And, how many would you make ground stuff, and how many objects? And, if you did use more than 7, think about how slow it would be. Put 5 or so white "explosions" on one screen, and that in itself creates serious lag. So, 134217728 layers would probably not even load on standard computers.