In Ice Breaker, you will have to break the ice to open the passage for your ship. The icebergs clump together with many different numbers, aim and shoot at those icebergs until the number on the iceberg returns to 0 and disappears. Icebergs also contain a few bonuses that help you increase your firepower, collecting many rewards will make the game more interesting. Note that you should not crash into them or get hit by other warships if you don't want to lose. Good luck!