1-2 players(characters: P1-One Eye, P2-Red Dog)
button 1 - guard(hold the button down)/Start game/select difficulty/dig(as you're standing on crossbones)
forward & 1 - attack
away, 1(quickly) - reverse attack
Up/Down - change swords position(you'll attack/guard either high or low)/climb
button 2 - turn around
You can coin feed for health. Items are picked up by walking over them. Walk onto a red cross to jump/swing to the next area. There actually is a boss battle where turning away and reverse attacking makes sense. Also the games pits your pirate(s) against ninja early on(pictured above).