I spent about an hour on a run, got the Brit-o-meter to max, and had a lot of fun exploring your game's meta along the way. I have a good amount of feedback for you guys...
-Many chests are positioned in a way that you can send one regular pirate on a suicide mission to get the massive amount of booty in the chest at the expense of his life. I was able to use this tactic to rack up over 500 rum before I retired with no risk of losing. A potential fix might be to make it so pirates have to return to the ship before you get the loot.
-It gets to a point where there are so many cannons, and they're positioned in such a way that no matter how many or what combination of pirates you send to a chest, it's impossible to get the chest. Even with pistol pirates, there were instances where my guys were getting bombarded by three cannons from the fortress above and they didn't have the range to retaliate, so they just got wiped out by AoE damage.
-The pirates ragdoll in really funny (but maybe unintended) ways. Sometimes they just freeze and t-pose where they are. My favorite is when they fall over t-posing and start rolling down a hill forever.
-The three resources are a bit unbalanced. By the end of the game, I had enough rum to run a popular liquor store for the rest of my life without owning a brewery. I had far more gunpowder than I had gold to buy pistol pirates, resulting in about 400 of it sitting useless. Maybe more features would help these things too, like different things you can spend resources on.
-There were a couple visual glitches with the models, like a plane not lining up with the rest of the terrain so you could see the obvious rectangular model.
Overall, I had a lot of fun playing your game, and I was extremely impressed with the art. The gameplay isn't super original but is made up for by the humor and the design. The sounds the pirates make when you spawn them crack me up every time and the music really exemplifies the pirate theme. Great job on this project!