So far the game seems to very well made and in-depth! I'm surprised with how much you managed to put into this jam title! My initial gripe was with the UI where trying to exit to different screens was buggy and got me stuck for a bit. Utilizing your ship to fight off other pirates felt pretty good and I loved the amount of upgrades you can get to enhance it. Your team really nailed that "pirate" theme well!
I would recommend adding some tutorial prompts or some sort of guide to the game to help figure out what to do but aside from that this is quite a solid game!