Very enjoyable! It feels like exactly what happens when I play Sea of Thieves with friends; going in circles, crashing into objects, and missing shots. Also, one minor detail you could have added was to have the pirates say "port" and "starboard" for the directions, not really important though. Overall pretty polished too but I did manage to sail into the mountains. 
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Aye! We chose port and starboard for the voice lines, but figured that a lot of players wouldn't actually know off the top of their head with side was which (I know I didn't without a hasty google search haha) - but yeah, I think if it was made into a full game, I'd push for proper nautical terms to be used ;)