I am not sure how this game in anyway encourages violence. From Mac Daily News:
Democratic Senator Chris Murphy is all upset about the app, but it isn't clear that he has even tried it.
“The NRA seems intent on continuing to insult the families of the victims of Sandy Hook,” the Connecticut Democrat said in a statement. “How could they think it was a good idea to use the one month anniversary of the tragedy at Sandy Hook to release a game that teaches four year olds to shoot assault weapons? No matter what outrageous new tool they use, the NRA cannot make a straight-faced case that sport shooters need military-style weapons to enjoy their hobby.” . . .