Attack of the round balls

You were surrounded and now you are starting to fire on all sides and a small round balls that even a very personal to look at, but pardoned them once you need to save your life, and it means that all of them must be destroyed before the time until they finish their recharge Cannon! Once the battle begins immediately point the scope for insolent and open fire, if you have time to do away with them ahead of time, you will not suffer!