Click on the empty tiles to the left to construct buildings, use them to defend your base from enemy and to produce units to attack them. All structures are upgradeable, which makes either them or units they produce more powerful.
Your objective in this game is to outrace the other pirates to the island treasure. Pirates do what pirates do - they play dirty. Use your cannons to shoot the enemy before they shoot you, and try to outsmart them to the end.
Defend your moon base from the alien Armada! Last as long as you can, blasting enemy missiles and ships while your base upgrades itself into a bunker of destruction!