I don't know if a glitch is guide worthy, but whatever.

Play the game normally until you get to the inn for the first time. Talk to the "insane pirate" and accept his crackers. Then he'll ask you to listen to his story. Highlight no, but instead of left clicking, right click. You'll accept and recieve more crackers. This will presumably keep going until you accidently left click "no" and continue the game as normal.

Using this glitch to get more than 90 crackers will risk you losing the "do everything" achievement. This achievement is triggered by total score, if you don't have the right amount of crackers, you're score won't line up with what the achievement looks for at the end of the game.