Submarine crusher free       

In this game your trying to destroy submarines with Sea mines and charges. You can move to dodge enemy fire. You have health. When your battling a boss you can't get hit ( or you'll die ). Level 5 is the 1st boss battle. You can block with countermeasures. Bosses have a health bar (regular enemies just have a health of 1). Boss ships are escorted when they go back and forth on then screen and are a lot bigger. 


You can check this out at: http://itunes.apple.com/us/app/submarine-crusher-be-navy/id458326299?mt=8