It will make it harder for the people to concentrate. It'll surprise them. Check out JayWood860's game "Homer and Stewie" it changes background.

Have the rocks kill nyan cat. public void killNyanCat(Class clss) Actor actor = getOneObjectAtOffset(0,0,clss); if(actor != null) { getWorld().removeObject(actor); } this is the method signature: killNyanCat(NyanCat.class);