I really liked this!
The overall concept of the sinking ship was very well executed, and the artstyle is great, the music is good, and I dig the sense of humour. Oh and the ending sequence is fun, reminds me of the pirate level from Sly 3.
The only kinda quibble I have is barrels taking maybe a half second longer than they feel like they should to be destroyed. But that's such a minor point that I'm really just looking for ANY possible area the game can be improved.
Overall the game gives Monkey Island vibes which is awesome, I think we need more pirate dungeon crawlers!
Great work!