Pirates! Showdown

Pirates! Showdown is a casual naval real-time strategy game with one single resource (gold), two kinds of units (small pirate ships or big pirate ships), and only a few structures. You start with a few towns, which generate a revenue stream. Upgrading a town increases your gold intake rate. Of course, your AI enemy is on the other side of the screen doing the same things, so you must be quick in your decisions in order to overcome it. Conquer an enemy town and you win the level. (mobygames.com)