Nice one! Sadly, I got plundered. I had a heck of a time trying to hit those smaller ships. I really like the use of the 3d model for the cannon (I think that is what that was?) and I respect the hell out of you keeping the memory of a cherished minigame alive. Also always nice to see a fellow Godot user around.
One tip- you should communicate to players more clearly that they should reload with R - have a one-time popup or something. I had to check the text on the page to see how to get more cannonballs. Anyway- good job!