That was a fun playthough, especially for a first game :)
I'd like to see what sort of gameplay you add to this, if you plan to keep making it. You should get tons of feedback from other devs and it's nice to try and fix what you think is needed as it gives you another feeling of completeness, just like the one you get when you submit the game :D
For the feedback, Id recommend a couple of changes. First, it would be nice to see which side of the ship the cannon is on as I kep losing track when the ship changed directions :O
Next I think ti would be helpful to add a text overlay that explains you need to collide with the big ship to enter. It might just be me, but I randomly sailed around then tried boarding the beach, only to be greeted with a message saying I broke my ship :( :P
Overall, it was a fun game and if you do make any additions or changes, I'll happily give it another playthrough