Shooting Cannon Merge Defense is an interesting free online game designed for boys. Players need to collect various types of battery deployments, and the same battery can be synthesized. Three identical ones are synthesized into a more advanced one, and various enemies will appear constantly in the checkpoint, and players need to use the battery to shoot and destroy them. Have fun! Shooting Cannon Merge Defense,free online game,boys game,merge game,battery merge,defense game,puzzle game,online game,HTML5 game,kids game,brain training,shooting game,skill game,Android game,fun game,number game,strategy game,checkpoint defense