This fun game is similar to Island Defense and I think instead of Dry Fire, it should be called Canon Defense instead. Because in this Flash game, you control a large cannon and you have to defend yourself from the incoming enemy soldiers. Simple isn’t it? But wait. On higher level, you’ll be also attacked by somekind-of-tank and somekind-of-chopper. The bad news is, they only need a few shots to destroy you. So be sure you destroy them first before taking care the little infantry ones.