I thought I'd hit upon something using bidding for a pirate TTRPG, but I absolutely love that this game uses bluffing as well. Reworking Liar's Dice into a resolution mechanic is such a wild and fascinating concept, and I'll absolutely be pulling this up the next time my group does a one-shot. What an awesome execution of a clever idea!
The Duty playbooks, character creation, and GM tips (and most of the game, really) are full of flavor and fun choices. I would have assumed magic in a game like this would be more vague and narrative-based, but I do appreciate that the spells available are focused and themed around the game rather than attempting to capture the broadest possible array of effects.
Actually, that's kind of the vibe I get from the whole thing — I would have expected a much smaller game from the premise, but it's not like you've put in a lot of unnecessary filler or meaningless crunch; everything expands on the core concept and contributes to the overall feeling and flavor.
I do think you could make more use of tables and lines to separate out rules sections, lists, and statblocks; the background is fun and flavorful, but it does make certain parts hard to read, especially where the headers and titles overlap, and the text sometimes gets hard to identify. Didn't cause me too much trouble, but it's something to think about.
Really cool stuff, awesome game!