That’s a really good score which means you already know that if you destroy 2 turrets will give you more points. You can get close to 400 if you get it in less than 30 seconds and only use 6 shots.
The game also includes another small easter egg (also included on the original mini-game). Only one person found it so far but he did it by looking at the source code. It’s the kind of easter egg that only ATMachine would know. Besides these easter eggs, it also includes some other minor details like leaving holes on the fort. Most of the game should be a pretty good copy of the original with a few exceptions. For instance, the pirates don’t cheer as long as they do in the original game when you hit the fort, but I couldn’t be bothered to fix it.
And the proudest moment of publishing the game was Jonathan Ackley sharing it on Facebook. He was most likely the one who did the coding of this part on the original game.