Jim the Cabin Boy must make his way below decks to collect various items of booty (automatically picked up when he walks past it) strewn around the ship.
When you have collected all the items from the Black Galleon’s 20 holds (screens), you will be given 45 seconds to locate the Bronze key to the next pile of booty. Clearing all booty a second and third (impossible!) time causes a search for the Silver and Gold keys, each increasing the game’s speed and hazards.
Jim will meet an untimely death if he falls through a trap door, drowns, is bitten by a ship’s rat, or pecked by one of the Captain’s parrots, or cut down by a Ghost Pirate, or blown up (some pieces of booty are booby-trapped, so step lively, mates) or steps through a hold door into mid-air or the ocean.

Salvador Cantero recently announced on Twitter, that a remake version of Booty for the Amstrad CPC is coming. Not much more information just yet, but judging by the screen shots, we have a lot to look forward to.
“Do you want to try the new “Booty, The Remake” for Amstrad CPC? With the collaborations of Beyker, Brundij and @blackmores_. We show it to you exclusively in @AmstradEterno. Come visit our @PlayOnRetro stand.
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Source: Twitter
This is how Jim moves on the Amstrad CPC 464. It’s faster but easier to play than the 1984-86 versions. Game music and sound is not final.