Grindy, generic pirate arcade game. You captain a slow ship around islands and shoot down other boats with your cannons, collect their randomly generated crafting materials, use that to slowly upgrade your ship parts, and repeat.
Played for 2 or 3 hours but it got pretty repetitive and boring by then. It's just a lot of sailing back and forth, button mashing, and collecting resources. No real skill or tactics involved, no real challenge, just a long grind.