Something for Upgrade 2

A few things to possibly extend the gameplay. A ship dry dock and construction facility, with the ability to build another ship, a battleship/destroyer (whatever you want to call it) with a batlle score of 900 (like the current one in the game), this ship could be be rediculously expensive to build.
A GPS satelite for the rockets that only becomes available after launching a pre-determined number (say 20) rockets that can also be expensive to build.
A final island that is only revealed after a successful launch of a GPS satelite that happens to be the pirates home island that has a 2 ships defending with a battle score of 1800 points (neccessiatating the construction of the second ship in the dry dock). What this new island adds to end game is an impoverished people on the brink of starvation, requiring a steady delivery of food supplies but what they offer in return is another supply of mineable ores that your island may have run out of already (coal, iron, limestone and sand).

Sorry, should of been titled "Something for Update 2"