Great little game! As others mentioned: If you haven't played the 2011 card game Scoundrel then tutorial on weapons, repairing, and how they work isn't intuitive.
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Still I'm lovin' the different challenge runs I've seen in the comments. Definitely going to try for the Weapon-with-Ace-down-through-to-2 challenge soon!
(Try the following once you've beaten the game and get how it works)
Challenge 1: Finish without anyone getting ate. Bonus if you can do it while both characters are holding the Ace rope
Challenge 2: First (Jack) fox that shows up will eat the ferret on the spread he appeared or the next. Finish the rest of the game with your new (useless) fox companion.
Challenge 3: (I'm still attempting this) Same, but with the fish getting ate instead. Jack might be too low, so may try upping this to King to see if it's even viable. (Repair is way too good)
Challenge 4: Use the fish and get a 9 or 10 weapon (Since they're the only way to deal with an 'Ace/14' kraken via the fish) and have it completely filled with all monsters from Ace down to 2
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Anyone else got their own challenge runs?