add validation for difficutly in games
add validation for difficutly in games

Bastonis/HuddleUp,Bastonis/SquareUp,Revolaution/HuddleUp,Bastonis/HuddleUp,Bastonis/SquareUp,Bastonis/HuddleUp,Revolaution/HuddleUp,Revolaution/HuddleUp,Bastonis/SquareUp