So i must say it was a bit jarring starting in the game straight away. But on first looks i was very impressed by your 3D Models. then i attempted to move and the boat felt a little strange, the cursor for firing appeared to not be on the screen and i had to find it. The cannon balls did not seem to fire very far and could actually get caught on previous fired balls stopping you from shooting past them. Rocks seemed to be the only thing that damaged you and as previously said you could get negative health and never lose. I wasn't really sure if the points went up when i shot something or just hit it with my boat.
Overall a really cool concept and art style i think ti just needs a bit more work to make it into a great game!