Players control the main character named Jim Avery, who is an adventurer searching for the Captain Silver's secret treasure hidden in an island. The game then consists in guiding him throughout varied scenes, including towns, pirate ships and jungles among them. The enemies are not pirates, but other creatures such as rats, skeletons and other terror-like monsters, though also natives can be found. Defeating enemies lends gold, which can be used to buy certain power-ups.
Source: Wikipedia, "Captain silver", available under the CC-BY-SA License.