It's a nice animation...
I only see two things that bothers me in this flash. One, it would be nice if it had a replay button instead of a constant loop. Two, I see the shotgun fire two shells twice. Being a double barrelled shotgun, it would either fire both barrels at the same time or each barrel seperately. It may be Newgrounds, but logic can increase the quality of a flash. Otherwise, welcome to Newgrounds, enjoy your stay and keep up the good work!